21120010122122 has 16 divisors (see below), whose sum is σ = 31956970971744. Its totient is φ = 10468085250000.

The previous prime is 21120010122067. The next prime is 21120010122271. The reversal of 21120010122122 is 22122101002112.

It is a self number, because there is not a number n which added to its sum of digits gives 21120010122122.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99590129 + ... + 99801972.

It is an arithmetic number, because the mean of its divisors is an integer number (1997310685734).

Almost surely, 2^{21120010122122} is an apocalyptic number.

21120010122122 is a deficient number, since it is larger than the sum of its proper divisors (10836960849622).

21120010122122 is a wasteful number, since it uses less digits than its factorization.

21120010122122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199392565.

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

Adding to 21120010122122 its reverse (22122101002112), we get a palindrome (43242111124234).

The spelling of 21120010122122 in words is "twenty-one trillion, one hundred twenty billion, ten million, one hundred twenty-two thousand, one hundred twenty-two".