1231032113100 has 108 divisors (see below), whose sum is σ = 3863701134384. Its totient is φ = 327841395840.

The previous prime is 1231032113089. The next prime is 1231032113107. The reversal of 1231032113100 is 13112301321.

1231032113100 is a `hidden beast` number, since 1 + 2 + 31 + 0 + 321 + 1 + 310 + 0 = 666.

It is a super-2 number, since 2×1231032113100² (a number of 25 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (1231032113107) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 222144 + ... + 1584743.

Almost surely, 2^{1231032113100} is an apocalyptic number.

1231032113100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1231032113100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1931850567192).

1231032113100 is an abundant number, since it is smaller than the sum of its proper divisors (2632669021284).

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

1231032113100 is a wasteful number, since it uses less digits than its factorization.

1231032113100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1807664 (or 1807654 counting only the distinct ones).

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

Adding to 1231032113100 its reverse (13112301321), we get a palindrome (1244144414421).

The spelling of 1231032113100 in words is "one trillion, two hundred thirty-one billion, thirty-two million, one hundred thirteen thousand, one hundred".