20312212012213 has 16 divisors (see below), whose sum is σ = 22225166810496. Its totient is φ = 18410325373440.

The previous prime is 20312212012129. The next prime is 20312212012217. The reversal of 20312212012213 is 31221021221302.

It is not a de Polignac number, because 20312212012213 - 2⁹ = 20312212011701 is a prime.

It is a super-2 number, since 2×20312212012213² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20312212012217) 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, 193871920 + ... + 193976662.

It is an arithmetic number, because the mean of its divisors is an integer number (1389072925656).

Almost surely, 2^{20312212012213} is an apocalyptic number.

It is an amenable number.

20312212012213 is a deficient number, since it is larger than the sum of its proper divisors (1912954798283).

20312212012213 is a wasteful number, since it uses less digits than its factorization.

20312212012213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157404.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 20312212012213 its reverse (31221021221302), we get a palindrome (51533233233515).

The spelling of 20312212012213 in words is "twenty trillion, three hundred twelve billion, two hundred twelve million, twelve thousand, two hundred thirteen".