131311012220 has 24 divisors (see below), whose sum is σ = 275772896784. Its totient is φ = 52520638976.

The previous prime is 131311012211. The next prime is 131311012223. The reversal of 131311012220 is 22210113131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131311012223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59564 + ... + 515916.

It is an arithmetic number, because the mean of its divisors is an integer number (11490537366).

Almost surely, 2^131311012220 is an apocalyptic number.

131311012220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131311012220 is an abundant number, since it is smaller than the sum of its proper divisors (144461884564).

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

131311012220 is a wasteful number, since it uses less digits than its factorization.

131311012220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470749 (or 470747 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 131311012220 its reverse (22210113131), we get a palindrome (153521125351).

The spelling of 131311012220 in words is "one hundred thirty-one billion, three hundred eleven million, twelve thousand, two hundred twenty".