31201112321 has 8 divisors (see below), whose sum is σ = 31397094144. Its totient is φ = 31005186480.

The previous prime is 31201112251. The next prime is 31201112351. The reversal of 31201112321 is 12321110213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31201112321 - 2²² = 31196918017 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 31201112321.

It is not an unprimeable number, because it can be changed into a prime (31201112351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2019536 + ... + 2034926.

It is an arithmetic number, because the mean of its divisors is an integer number (3924636768).

Almost surely, 2^31201112321 is an apocalyptic number.

It is an amenable number.

31201112321 is a deficient number, since it is larger than the sum of its proper divisors (195981823).

31201112321 is a wasteful number, since it uses less digits than its factorization.

31201112321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27991.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 31201112321 its reverse (12321110213), we get a palindrome (43522222534).

The spelling of 31201112321 in words is "thirty-one billion, two hundred one million, one hundred twelve thousand, three hundred twenty-one".