1231100031132 has 18 divisors (see below), whose sum is σ = 3111947301008. Its totient is φ = 410366677032.

The previous prime is 1231100031127. The next prime is 1231100031137. The reversal of 1231100031132 is 2311300011321.

1231100031132 is a `hidden beast` number, since 12 + 311 + 0 + 0 + 0 + 311 + 32 = 666.

It is an interprime number because it is at equal distance from previous prime (1231100031127) and next prime (1231100031137).

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-3 number, since 3×1231100031132³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231100031137) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17098611508 + ... + 17098611579.

Almost surely, 2^{1231100031132} is an apocalyptic number.

1231100031132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1231100031132 is an abundant number, since it is smaller than the sum of its proper divisors (1880847269876).

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

1231100031132 is a wasteful number, since it uses less digits than its factorization.

1231100031132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34197223097 (or 34197223092 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 1231100031132 its reverse (2311300011321), we get a palindrome (3542400042453).

The spelling of 1231100031132 in words is "one trillion, two hundred thirty-one billion, one hundred million, thirty-one thousand, one hundred thirty-two".