1231131131010 has 48 divisors (see below), whose sum is σ = 3491935574400. Its totient is φ = 298456031520.

The previous prime is 1231131131003. The next prime is 1231131131051. The reversal of 1231131131010 is 101311311321.

1231131131010 is a `hidden beast` number, since 1 + 2 + 31 + 1 + 311 + 310 + 10 = 666.

It is a super-3 number, since 3×1231131131010³ (a number of 37 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon 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 23 ways as a sum of consecutive naturals, for example, 621782410 + ... + 621784389.

It is an arithmetic number, because the mean of its divisors is an integer number (72748657800).

Almost surely, 2^{1231131131010} is an apocalyptic number.

1231131131010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1231131131010 is an abundant number, since it is smaller than the sum of its proper divisors (2260804443390).

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

1231131131010 is a wasteful number, since it uses less digits than its factorization.

1231131131010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1243566823 (or 1243566820 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 18.

Adding to 1231131131010 its reverse (101311311321), we get a palindrome (1332442442331).

The spelling of 1231131131010 in words is "one trillion, two hundred thirty-one billion, one hundred thirty-one million, one hundred thirty-one thousand, ten".