31212013201 has 4 divisors (see below), whose sum is σ = 31213546992. Its totient is φ = 31210479412.

The previous prime is 31212013199. The next prime is 31212013213. The reversal of 31212013201 is 10231021213.

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 31212013201 - 2¹ = 31212013199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31212013271) 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, 735955 + ... + 777208.

It is an arithmetic number, because the mean of its divisors is an integer number (7803386748).

Almost surely, 2^31212013201 is an apocalyptic number.

It is an amenable number.

31212013201 is a deficient number, since it is larger than the sum of its proper divisors (1533791).

31212013201 is a wasteful number, since it uses less digits than its factorization.

31212013201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1533790.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 31212013201 its reverse (10231021213), we get a palindrome (41443034414).

The spelling of 31212013201 in words is "thirty-one billion, two hundred twelve million, thirteen thousand, two hundred one".