22220412131 has 4 divisors (see below), whose sum is σ = 22222134264. Its totient is φ = 22218690000.

The previous prime is 22220412107. The next prime is 22220412157. The reversal of 22220412131 is 13121402222.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22220412131 is a prime.

It is a super-2 number, since 2×22220412131² (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 (22220412101) 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, 841565 + ... + 867566.

It is an arithmetic number, because the mean of its divisors is an integer number (5555533566).

Almost surely, 2^22220412131 is an apocalyptic number.

22220412131 is a deficient number, since it is larger than the sum of its proper divisors (1722133).

22220412131 is a wasteful number, since it uses less digits than its factorization.

22220412131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1722132.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 22220412131 its reverse (13121402222), we get a palindrome (35341814353).

Subtracting from 22220412131 its reverse (13121402222), we obtain a palindrome (9099009909).

The spelling of 22220412131 in words is "twenty-two billion, two hundred twenty million, four hundred twelve thousand, one hundred thirty-one".