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21221100122210 = 2511632777657071
BaseRepresentation
bin1001101001100111011000…
…01000100111000001100010
32210010201100221202212211222
410310303230020213001202
510240141303112402320
6113044501103335042
74320113433554132
oct464635410470142
983121327685758
1021221100122210
1168418aa87125a
12246895b5b1482
13bac1ab16a851
1453516cbdcac2
1526c022199825
hex134cec227062

21221100122210 has 32 divisors (see below), whose sum is σ = 38244649727232. Its totient is φ = 8478074335360.

The previous prime is 21221100122207. The next prime is 21221100122263. The reversal of 21221100122210 is 1222100112212.

It is a super-2 number, since 2×212211001222102 (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31967975 + ... + 32625045.

It is an arithmetic number, because the mean of its divisors is an integer number (1195145303976).

Almost surely, 221221100122210 is an apocalyptic number.

21221100122210 is a deficient number, since it is larger than the sum of its proper divisors (17023549605022).

21221100122210 is a wasteful number, since it uses less digits than its factorization.

21221100122210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661018.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21221100122210 its reverse (1222100112212), we get a palindrome (22443200234422).

The spelling of 21221100122210 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred million, one hundred twenty-two thousand, two hundred ten".

Divisors: 1 2 5 10 1163 2326 2777 5554 5815 11630 13885 27770 657071 1314142 3229651 3285355 6459302 6570710 16148255 32296510 764173573 1528347146 1824686167 3649372334 3820867865 7641735730 9123430835 18246861670 2122110012221 4244220024442 10610550061105 21221100122210