22020012331 has 4 divisors (see below), whose sum is σ = 23315307192. Its totient is φ = 20724717472.

The previous prime is 22020012317. The next prime is 22020012493. The reversal of 22020012331 is 13321002022.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22020012331 - 2¹⁵ = 22019979563 is a prime.

It is a super-2 number, since 2×22020012331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22020012731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 647647405 + ... + 647647438.

It is an arithmetic number, because the mean of its divisors is an integer number (5828826798).

Almost surely, 2^22020012331 is an apocalyptic number.

22020012331 is a deficient number, since it is larger than the sum of its proper divisors (1295294861).

22020012331 is a wasteful number, since it uses less digits than its factorization.

22020012331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1295294860.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 22020012331 its reverse (13321002022), we get a palindrome (35341014353).

The spelling of 22020012331 in words is "twenty-two billion, twenty million, twelve thousand, three hundred thirty-one".