21202112210122 has 64 divisors (see below), whose sum is σ = 34384308013440. Its totient is φ = 9774680832000.

The previous prime is 21202112210117. The next prime is 21202112210137. The reversal of 21202112210122 is 22101221120212.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 21202112210122.

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 31 ways as a sum of consecutive naturals, for example, 157354993 + ... + 157489675.

It is an arithmetic number, because the mean of its divisors is an integer number (537254812710).

Almost surely, 2^{21202112210122} is an apocalyptic number.

21202112210122 is a deficient number, since it is larger than the sum of its proper divisors (13182195803318).

21202112210122 is a wasteful number, since it uses less digits than its factorization.

21202112210122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135479.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21202112210122 its reverse (22101221120212), we get a palindrome (43303333330334).

The spelling of 21202112210122 in words is "twenty-one trillion, two hundred two billion, one hundred twelve million, two hundred ten thousand, one hundred twenty-two".