131220213222 has 32 divisors (see below), whose sum is σ = 300039724800. Its totient is φ = 37478013408.

The previous prime is 131220213221. The next prime is 131220213253. The reversal of 131220213222 is 222312022131.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131220213221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 442972 + ... + 677247.

It is an arithmetic number, because the mean of its divisors is an integer number (9376241400).

Almost surely, 2^131220213222 is an apocalyptic number.

131220213222 is an abundant number, since it is smaller than the sum of its proper divisors (168819511578).

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

131220213222 is a wasteful number, since it uses less digits than its factorization.

131220213222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1123020.

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

Adding to 131220213222 its reverse (222312022131), we get a palindrome (353532235353).

The spelling of 131220213222 in words is "one hundred thirty-one billion, two hundred twenty million, two hundred thirteen thousand, two hundred twenty-two".