21223231122122 has 16 divisors (see below), whose sum is σ = 31850439517512. Its totient is φ = 10606419183360.

The previous prime is 21223231122113. The next prime is 21223231122139. The reversal of 21223231122122 is 22122113232212.

It can be written as a sum of positive squares in 4 ways, for example, as 7104191906161 + 14119039215961 = 2665369^2 + 3757531^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21223231122091 and 21223231122100.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34581968 + ... + 35190324.

Almost surely, 2^{21223231122122} is an apocalyptic number.

21223231122122 is a deficient number, since it is larger than the sum of its proper divisors (10627208395390).

21223231122122 is a wasteful number, since it uses less digits than its factorization.

21223231122122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616873.

The product of its digits is 2304, while the sum is 26.

Adding to 21223231122122 its reverse (22122113232212), we get a palindrome (43345344354334).

The spelling of 21223231122122 in words is "twenty-one trillion, two hundred twenty-three billion, two hundred thirty-one million, one hundred twenty-two thousand, one hundred twenty-two".