1231001013100 has 72 divisors (see below), whose sum is σ = 2919644880768. Its totient is φ = 448486118400.

The previous prime is 1231001013059. The next prime is 1231001013127. The reversal of 1231001013100 is 13101001321.

It is a super-2 number, since 2×1231001013100² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11626627 + ... + 11732026.

It is an arithmetic number, because the mean of its divisors is an integer number (40550623344).

Almost surely, 2^{1231001013100} is an apocalyptic number.

1231001013100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231001013100 is an abundant number, since it is smaller than the sum of its proper divisors (1688643867668).

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

1231001013100 is a wasteful number, since it uses less digits than its factorization.

1231001013100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23358715 (or 23358708 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 13.

Adding to 1231001013100 its reverse (13101001321), we get a palindrome (1244102014421).

The spelling of 1231001013100 in words is "one trillion, two hundred thirty-one billion, one million, thirteen thousand, one hundred".