21122332312213 has 6 divisors (see below), whose sum is σ = 23217109070582. Its totient is φ = 19202120283720.

The previous prime is 21122332312171. The next prime is 21122332312261. The reversal of 21122332312213 is 31221323322112.

It can be written as a sum of positive squares in only one way, i.e., 20963742789924 + 158589522289 = 4578618^2 + 398233^2 .

It is not a de Polignac number, because 21122332312213 - 2⁹ = 21122332311701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122332312283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 87282364806 + ... + 87282365047.

Almost surely, 2^{21122332312213} is an apocalyptic number.

It is an amenable number.

21122332312213 is a deficient number, since it is larger than the sum of its proper divisors (2094776758369).

21122332312213 is a wasteful number, since it uses less digits than its factorization.

21122332312213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174564729875 (or 174564729864 counting only the distinct ones).

The product of its digits is 5184, while the sum is 28.

Adding to 21122332312213 its reverse (31221323322112), we get a palindrome (52343655634325).

The spelling of 21122332312213 in words is "twenty-one trillion, one hundred twenty-two billion, three hundred thirty-two million, three hundred twelve thousand, two hundred thirteen".