12131222022 has 24 divisors (see below), whose sum is σ = 26654518800. Its totient is φ = 3986786160.

The previous prime is 12131222021. The next prime is 12131222041. The reversal of 12131222022 is 22022213121.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 12131221986 and 12131222004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12131222021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4744897 + ... + 4747452.

It is an arithmetic number, because the mean of its divisors is an integer number (1110604950).

Almost surely, 2^12131222022 is an apocalyptic number.

12131222022 is an abundant number, since it is smaller than the sum of its proper divisors (14523296778).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12131222022 is a wasteful number, since it uses less digits than its factorization.

12131222022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9492428 (or 9492425 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 12131222022 its reverse (22022213121), we get a palindrome (34153435143).

The spelling of 12131222022 in words is "twelve billion, one hundred thirty-one million, two hundred twenty-two thousand, twenty-two".