31200112421 has 4 divisors (see below), whose sum is σ = 32556639072. Its totient is φ = 29843585772.

The previous prime is 31200112417. The next prime is 31200112453. The reversal of 31200112421 is 12421100213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31200112421 - 2² = 31200112417 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31200112421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31200112481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 678263291 + ... + 678263336.

It is an arithmetic number, because the mean of its divisors is an integer number (8139159768).

Almost surely, 2^31200112421 is an apocalyptic number.

It is an amenable number.

31200112421 is a deficient number, since it is larger than the sum of its proper divisors (1356526651).

31200112421 is a wasteful number, since it uses less digits than its factorization.

31200112421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1356526650.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 31200112421 its reverse (12421100213), we get a palindrome (43621212634).

The spelling of 31200112421 in words is "thirty-one billion, two hundred million, one hundred twelve thousand, four hundred twenty-one".