122131013221 has 12 divisors (see below), whose sum is σ = 144557319712. Its totient is φ = 101073937104.

The previous prime is 122131013201. The next prime is 122131013227. The reversal of 122131013221 is 122310131221.

It is not a de Polignac number, because 122131013221 - 2²¹ = 122128916069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122131013227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10367055 + ... + 10378828.

Almost surely, 2^122131013221 is an apocalyptic number.

It is an amenable number.

122131013221 is a deficient number, since it is larger than the sum of its proper divisors (22426306491).

122131013221 is an equidigital number, since it uses as much as digits as its factorization.

122131013221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20745948 (or 20745919 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 122131013221 its reverse (122310131221), we get a palindrome (244441144442).

The spelling of 122131013221 in words is "one hundred twenty-two billion, one hundred thirty-one million, thirteen thousand, two hundred twenty-one".