31040121310400 has 42 divisors (see below), whose sum is σ = 76378098503340. Its totient is φ = 12416048523520.

The previous prime is 31040121310343. The next prime is 31040121310417. The reversal of 31040121310400 is 401312104013.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9700036310 + ... + 9700039509.

Almost surely, 2^{31040121310400} is an apocalyptic number.

It is an amenable number.

31040121310400 is an abundant number, since it is smaller than the sum of its proper divisors (45337977192940).

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

31040121310400 is a wasteful number, since it uses less digits than its factorization.

31040121310400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19400075841 (or 19400075826 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 31040121310400 its reverse (401312104013), we get a palindrome (31441433414413).

The spelling of 31040121310400 in words is "thirty-one trillion, forty billion, one hundred twenty-one million, three hundred ten thousand, four hundred".