122112021221 has 16 divisors (see below), whose sum is σ = 128185958208. Its totient is φ = 116193571200.

The previous prime is 122112021209. The next prime is 122112021223. The reversal of 122112021221 is 122120211221.

It is a cyclic number.

It is not a de Polignac number, because 122112021221 - 2²² = 122107826917 is a prime.

It is a super-2 number, since 2×122112021221² (a number of 23 digits) contains 22 as substring.

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 122112021221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122112021223) 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, 1168115 + ... + 1268351.

It is an arithmetic number, because the mean of its divisors is an integer number (8011622388).

Almost surely, 2^122112021221 is an apocalyptic number.

It is an amenable number.

122112021221 is a deficient number, since it is larger than the sum of its proper divisors (6073936987).

122112021221 is a wasteful number, since it uses less digits than its factorization.

122112021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101012.

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

Adding to 122112021221 its reverse (122120211221), we get a palindrome (244232232442).

The spelling of 122112021221 in words is "one hundred twenty-two billion, one hundred twelve million, twenty-one thousand, two hundred twenty-one".