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21210200010000 = 243254235668889
BaseRepresentation
bin1001101001010011000100…
…11011111110110100010000
32210002200020022021210220100
410310221202123332310100
510240001442200310000
6113035455324212400
74316246346255261
oct464514233766420
983080208253810
1021210200010000
116838216a58661
12246681909a100
13bab161b47901
145348172d0968
hex134a626fed10

21210200010000 has 150 divisors (see below), whose sum is σ = 74175133445270. Its totient is φ = 5656053312000.

The previous prime is 21210200009959. The next prime is 21210200010011. The reversal of 21210200010000 is 1000201212.

Adding to 21210200010000 its reverse (1000201212), we get a palindrome (21211200211212).

21210200010000 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 5 ways, for example, as 2619581094144 + 18590618915856 = 1618512^2 + 4311684^2 .

It is a tau number, because it is divible by the number of its divisors (150).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 117744445 + ... + 117924444.

Almost surely, 221210200010000 is an apocalyptic number.

21210200010000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21210200010000 is an abundant number, since it is smaller than the sum of its proper divisors (52964933435270).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21210200010000 is a wasteful number, since it uses less digits than its factorization.

21210200010000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235668923 (or 235668899 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The spelling of 21210200010000 in words is "twenty-one trillion, two hundred ten billion, two hundred million, ten thousand".