122111200220021 has 16 divisors (see below), whose sum is σ = 123067525633920. Its totient is φ = 121157789688000.

The previous prime is 122111200219969. The next prime is 122111200220063. The reversal of 122111200220021 is 120022002111221.

It is a cyclic number.

It is not a de Polignac number, because 122111200220021 - 2¹⁴ = 122111200203637 is a prime.

It is a super-2 number, since 2×122111200220021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122111200220521) 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, 1391520896 + ... + 1391608646.

It is an arithmetic number, because the mean of its divisors is an integer number (7691720352120).

Almost surely, 2^{122111200220021} is an apocalyptic number.

It is an amenable number.

122111200220021 is a deficient number, since it is larger than the sum of its proper divisors (956325413899).

122111200220021 is a wasteful number, since it uses less digits than its factorization.

122111200220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104236.

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

Adding to 122111200220021 its reverse (120022002111221), we get a palindrome (242133202331242).

The spelling of 122111200220021 in words is "one hundred twenty-two trillion, one hundred eleven billion, two hundred million, two hundred twenty thousand, twenty-one".