20211121022111 has 16 divisors (see below), whose sum is σ = 21581505237600. Its totient is φ = 18892899916800.

The previous prime is 20211121022101. The next prime is 20211121022149. The reversal of 20211121022111 is 11122012111202.

It is a cyclic number.

It is not a de Polignac number, because 20211121022111 - 2²² = 20211116827807 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20211121022111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211121022101) 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, 64723706 + ... + 65035223.

It is an arithmetic number, because the mean of its divisors is an integer number (1348844077350).

Almost surely, 2^{20211121022111} is an apocalyptic number.

20211121022111 is a deficient number, since it is larger than the sum of its proper divisors (1370384215489).

20211121022111 is a wasteful number, since it uses less digits than its factorization.

20211121022111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129759130.

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

Adding to 20211121022111 its reverse (11122012111202), we get a palindrome (31333133133313).

The spelling of 20211121022111 in words is "twenty trillion, two hundred eleven billion, one hundred twenty-one million, twenty-two thousand, one hundred eleven".