122222222222221 has 24 divisors (see below), whose sum is σ = 134934707376000. Its totient is φ = 110622289377600.

The previous prime is 122222222222173. The next prime is 122222222222227.

122222222222221 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 122222222222221 - 2²³ = 122222213833613 is a prime.

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 122222222222221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122222222222227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 133989886 + ... + 134898976.

It is an arithmetic number, because the mean of its divisors is an integer number (5622279474000).

Almost surely, 2^{122222222222221} is an apocalyptic number.

122222222222221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

122222222222221 is a deficient number, since it is larger than the sum of its proper divisors (12712485153779).

122222222222221 is a wasteful number, since it uses less digits than its factorization.

122222222222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 914001 (or 913990 counting only the distinct ones).

The product of its digits is 8192, while the sum is 28.

It can be divided in two parts, 1 and 22222222222221, that added together give a palindrome (22222222222222).

The spelling of 122222222222221 in words is "one hundred twenty-two trillion, two hundred twenty-two billion, two hundred twenty-two million, two hundred twenty-two thousand, two hundred twenty-one".