202122122111 has 16 divisors (see below), whose sum is σ = 248816569344. Its totient is φ = 159888091104.

The previous prime is 202122122087. The next prime is 202122122131. The reversal of 202122122111 is 111221221202.

It is not a de Polignac number, because 202122122111 - 2³⁴ = 184942252927 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 202122122111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202122122131) 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, 225140 + ... + 674486.

It is an arithmetic number, because the mean of its divisors is an integer number (15551035584).

Almost surely, 2^202122122111 is an apocalyptic number.

202122122111 is a deficient number, since it is larger than the sum of its proper divisors (46694447233).

202122122111 is a wasteful number, since it uses less digits than its factorization.

202122122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454310.

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

Adding to 202122122111 its reverse (111221221202), we get a palindrome (313343343313).

Subtracting from 202122122111 its reverse (111221221202), we obtain a palindrome (90900900909).

The spelling of 202122122111 in words is "two hundred two billion, one hundred twenty-two million, one hundred twenty-two thousand, one hundred eleven".