21102110112122 has 32 divisors (see below), whose sum is σ = 34169825994192. Its totient is φ = 9716089872384.

The previous prime is 21102110112089. The next prime is 21102110112191. The reversal of 21102110112122 is 22121101120112.

It can be written as a sum of positive squares in 8 ways, for example, as 5458115460121 + 15643994652001 = 2336261^2 + 3955249^2 .

It is a super-2 number, since 2×21102110112122² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21102110112122.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18645638 + ... + 19744974.

Almost surely, 2^{21102110112122} is an apocalyptic number.

21102110112122 is a deficient number, since it is larger than the sum of its proper divisors (13067715882070).

21102110112122 is a wasteful number, since it uses less digits than its factorization.

21102110112122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101122.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21102110112122 its reverse (22121101120112), we get a palindrome (43223211232234).

The spelling of 21102110112122 in words is "twenty-one trillion, one hundred two billion, one hundred ten million, one hundred twelve thousand, one hundred twenty-two".