131223020022 has 48 divisors (see below), whose sum is σ = 302243825520. Its totient is φ = 41028552000.

The previous prime is 131223020011. The next prime is 131223020051. The reversal of 131223020022 is 220020322131.

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 = 131223019977 and 131223020004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1864929 + ... + 1934012.

It is an arithmetic number, because the mean of its divisors is an integer number (6296746365).

Almost surely, 2^131223020022 is an apocalyptic number.

131223020022 is an abundant number, since it is smaller than the sum of its proper divisors (171020805498).

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

131223020022 is a wasteful number, since it uses less digits than its factorization.

131223020022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3799069 (or 3799066 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 131223020022 its reverse (220020322131), we get a palindrome (351243342153).

The spelling of 131223020022 in words is "one hundred thirty-one billion, two hundred twenty-three million, twenty thousand, twenty-two".