122131221 has 16 divisors (see below), whose sum is σ = 172185600. Its totient is φ = 76787568.

The previous prime is 122131199. The next prime is 122131237.

122131221 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 122131221 - 2⁶ = 122131157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 122131221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122131271) 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, 8220 + ... + 17658.

It is an arithmetic number, because the mean of its divisors is an integer number (10761600).

Almost surely, 2^122131221 is an apocalyptic number.

It is an amenable number.

122131221 is a deficient number, since it is larger than the sum of its proper divisors (50054379).

122131221 is a wasteful number, since it uses less digits than its factorization.

122131221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9688.

The product of its digits is 48, while the sum is 15.

The square root of 122131221 is about 11051.2995163465. The cubic root of 122131221 is about 496.1453205933.

The spelling of 122131221 in words is "one hundred twenty-two million, one hundred thirty-one thousand, two hundred twenty-one".