21102111120122 has 16 divisors (see below), whose sum is σ = 31695668010600. Its totient is φ = 10536891920640.

The previous prime is 21102111120121. The next prime is 21102111120133. The reversal of 21102111120122 is 22102111120112.

It can be written as a sum of positive squares in 4 ways, for example, as 18982847738761 + 2119263381361 = 4356931^2 + 1455769^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21102111120122.

It is not an unprimeable number, because it can be changed into a prime (21102111120121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11354222 + ... + 13081382.

Almost surely, 2^{21102111120122} is an apocalyptic number.

21102111120122 is a deficient number, since it is larger than the sum of its proper divisors (10593556890478).

21102111120122 is a wasteful number, since it uses less digits than its factorization.

21102111120122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1735361.

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

Adding to 21102111120122 its reverse (22102111120112), we get a palindrome (43204222240234).

The spelling of 21102111120122 in words is "twenty-one trillion, one hundred two billion, one hundred eleven million, one hundred twenty thousand, one hundred twenty-two".