131220112220 has 12 divisors (see below), whose sum is σ = 275562235704. Its totient is φ = 52488044880.

The previous prime is 131220112183. The next prime is 131220112237. The reversal of 131220112220 is 22211022131.

It is a congruent number.

It is an unprimeable number.

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, 3280502786 + ... + 3280502825.

It is an arithmetic number, because the mean of its divisors is an integer number (22963519642).

Almost surely, 2^131220112220 is an apocalyptic number.

131220112220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131220112220 is an abundant number, since it is smaller than the sum of its proper divisors (144342123484).

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

131220112220 is a wasteful number, since it uses less digits than its factorization.

131220112220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6561005620 (or 6561005618 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 131220112220 its reverse (22211022131), we get a palindrome (153431134351).

The spelling of 131220112220 in words is "one hundred thirty-one billion, two hundred twenty million, one hundred twelve thousand, two hundred twenty".