22143220131 has 4 divisors (see below), whose sum is σ = 29524293512. Its totient is φ = 14762146752.

The previous prime is 22143220091. The next prime is 22143220147. The reversal of 22143220131 is 13102234122.

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

It is not a de Polignac number, because 22143220131 - 2⁶ = 22143220067 is a prime.

It is a super-2 number, since 2×22143220131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22143220098 and 22143220107.

It is not an unprimeable number, because it can be changed into a prime (22143240131) 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, 3690536686 + ... + 3690536691.

It is an arithmetic number, because the mean of its divisors is an integer number (7381073378).

Almost surely, 2^22143220131 is an apocalyptic number.

22143220131 is a deficient number, since it is larger than the sum of its proper divisors (7381073381).

22143220131 is an equidigital number, since it uses as much as digits as its factorization.

22143220131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7381073380.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 22143220131 its reverse (13102234122), we get a palindrome (35245454253).

The spelling of 22143220131 in words is "twenty-two billion, one hundred forty-three million, two hundred twenty thousand, one hundred thirty-one".