10131131220 has 72 divisors (see below), whose sum is σ = 32998551264. Its totient is φ = 2315686464.

The previous prime is 10131131167. The next prime is 10131131221. The reversal of 10131131220 is 2213113101.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 10131131220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10131131221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1720042 + ... + 1725921.

It is an arithmetic number, because the mean of its divisors is an integer number (458313212).

Almost surely, 2^10131131220 is an apocalyptic number.

10131131220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10131131220 is an abundant number, since it is smaller than the sum of its proper divisors (22867420044).

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

10131131220 is a wasteful number, since it uses less digits than its factorization.

10131131220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3445989 (or 3445980 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 10131131220 its reverse (2213113101), we get a palindrome (12344244321).

The spelling of 10131131220 in words is "ten billion, one hundred thirty-one million, one hundred thirty-one thousand, two hundred twenty".