31143040321200 has 120 divisors (see below), whose sum is σ = 100693890410688. Its totient is φ = 8227195664640.

The previous prime is 31143040321199. The next prime is 31143040321231. The reversal of 31143040321200 is 212304034113.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 121145122 + ... + 121401921.

Almost surely, 2^{31143040321200} is an apocalyptic number.

31143040321200 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31143040321200 is an abundant number, since it is smaller than the sum of its proper divisors (69550850089488).

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

31143040321200 is a wasteful number, since it uses less digits than its factorization.

31143040321200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242547171 (or 242547160 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 31143040321200 its reverse (212304034113), we get a palindrome (31355344355313).

The spelling of 31143040321200 in words is "thirty-one trillion, one hundred forty-three billion, forty million, three hundred twenty-one thousand, two hundred".