122179201221 has 64 divisors (see below), whose sum is σ = 206925373440. Its totient is φ = 62279221440.

The previous prime is 122179201181. The next prime is 122179201247. The reversal of 122179201221 is 122102971221.

It is a de Polignac number, because none of the positive numbers 2^k-122179201221 is a prime.

It is a super-2 number, since 2×122179201221² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122179201321) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7665166 + ... + 7681088.

It is an arithmetic number, because the mean of its divisors is an integer number (3233208960).

Almost surely, 2^122179201221 is an apocalyptic number.

122179201221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

122179201221 is a deficient number, since it is larger than the sum of its proper divisors (84746172219).

122179201221 is a wasteful number, since it uses less digits than its factorization.

122179201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16566.

The product of its (nonzero) digits is 2016, while the sum is 30.

The spelling of 122179201221 in words is "one hundred twenty-two billion, one hundred seventy-nine million, two hundred one thousand, two hundred twenty-one".