21120012210122 has 32 divisors (see below), whose sum is σ = 37168406026752. Its totient is φ = 8812137431664.

The previous prime is 21120012210113. The next prime is 21120012210127. The reversal of 21120012210122 is 22101221002112.

It is a self number, because there is not a number n which added to its sum of digits gives 21120012210122.

It is not an unprimeable number, because it can be changed into a prime (21120012210127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56953748 + ... + 57323375.

It is an arithmetic number, because the mean of its divisors is an integer number (1161512688336).

Almost surely, 2^{21120012210122} is an apocalyptic number.

21120012210122 is a deficient number, since it is larger than the sum of its proper divisors (16048393816630).

21120012210122 is a wasteful number, since it uses less digits than its factorization.

21120012210122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114277482.

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

Adding to 21120012210122 its reverse (22101221002112), we get a palindrome (43221233212234).

The spelling of 21120012210122 in words is "twenty-one trillion, one hundred twenty billion, twelve million, two hundred ten thousand, one hundred twenty-two".