31200123111444 has 108 divisors (see below), whose sum is σ = 91892885007924. Its totient is φ = 8899778458368.

The previous prime is 31200123111427. The next prime is 31200123111491. The reversal of 31200123111444 is 44411132100213.

It is a happy number.

31200123111444 is a `hidden beast` number, since 3 + 1 + 200 + 1 + 2 + 3 + 1 + 11 + 444 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 16049734588944 + 15150388522500 = 4006212^2 + 3892350^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 13345377 + ... + 15508040.

Almost surely, 2^{31200123111444} is an apocalyptic number.

It is an amenable number.

31200123111444 is an abundant number, since it is smaller than the sum of its proper divisors (60692761896480).

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

31200123111444 is a wasteful number, since it uses less digits than its factorization.

31200123111444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28854054 (or 28854042 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

Adding to 31200123111444 its reverse (44411132100213), we get a palindrome (75611255211657).

The spelling of 31200123111444 in words is "thirty-one trillion, two hundred billion, one hundred twenty-three million, one hundred eleven thousand, four hundred forty-four".