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21210200009999 = 7111329467172169
BaseRepresentation
bin1001101001010011000100…
…11011111110110100001111
32210002200020022021210220022
410310221202123332310033
510240001442200304444
6113035455324212355
74316246346255260
oct464514233766417
983080208253808
1021210200009999
116838216a58660
12246681909a0bb
13bab161b47900
145348172d0967
1526bad528b9ee
hex134a626fed0f

21210200009999 has 48 divisors (see below), whose sum is σ = 28637694478080. Its totient is φ = 15254387815680.

The previous prime is 21210200009959. The next prime is 21210200010011. The reversal of 21210200009999 is 99990000201212.

It is a happy number.

It is not a de Polignac number, because 21210200009999 - 28 = 21210200009743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21210200009959) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 123107987 + ... + 123280155.

It is an arithmetic number, because the mean of its divisors is an integer number (596618634960).

Almost surely, 221210200009999 is an apocalyptic number.

21210200009999 is a deficient number, since it is larger than the sum of its proper divisors (7427494468081).

21210200009999 is a wasteful number, since it uses less digits than its factorization.

21210200009999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181680 (or 181667 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 44.

The spelling of 21210200009999 in words is "twenty-one trillion, two hundred ten billion, two hundred million, nine thousand, nine hundred ninety-nine".

Divisors: 1 7 11 13 77 91 143 169 1001 1183 1859 9467 13013 66269 104137 123071 172169 728959 861497 1205183 1353781 1599923 1893859 2238197 9476467 11199461 13257013 15667379 17599153 24620167 29096561 123194071 172341169 203675927 320062171 1629923923 2240435197 11409467461 17929163153 21189010999 125504142071 148323076993 233079120989 275457142987 1631553846923 1928200000909 3030028572857 21210200009999