22131131213 has 4 divisors (see below), whose sum is σ = 22434297468. Its totient is φ = 21827964960.

The previous prime is 22131131177. The next prime is 22131131237. The reversal of 22131131213 is 31213113122.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 19198042249 + 2933088964 = 138557^2 + 54158^2 .

It is a cyclic number.

It is not a de Polignac number, because 22131131213 - 2¹⁴ = 22131114829 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 (22131131263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151583018 + ... + 151583163.

It is an arithmetic number, because the mean of its divisors is an integer number (5608574367).

Almost surely, 2^22131131213 is an apocalyptic number.

It is an amenable number.

22131131213 is a deficient number, since it is larger than the sum of its proper divisors (303166255).

22131131213 is an equidigital number, since it uses as much as digits as its factorization.

22131131213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303166254.

The product of its digits is 216, while the sum is 20.

Adding to 22131131213 its reverse (31213113122), we get a palindrome (53344244335).

The spelling of 22131131213 in words is "twenty-two billion, one hundred thirty-one million, one hundred thirty-one thousand, two hundred thirteen".