31201210013 has 4 divisors (see below), whose sum is σ = 31446888960. Its totient is φ = 30955531068.

The previous prime is 31201210009. The next prime is 31201210087. The reversal of 31201210013 is 31001210213.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31001210213 = 59627 ⋅519919.

It is a cyclic number.

It is not a de Polignac number, because 31201210013 - 2² = 31201210009 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 31201210013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31201210813) 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, 122839283 + ... + 122839536.

It is an arithmetic number, because the mean of its divisors is an integer number (7861722240).

Almost surely, 2^31201210013 is an apocalyptic number.

It is an amenable number.

31201210013 is a deficient number, since it is larger than the sum of its proper divisors (245678947).

31201210013 is a wasteful number, since it uses less digits than its factorization.

31201210013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245678946.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 31201210013 its reverse (31001210213), we get a palindrome (62202420226).

The spelling of 31201210013 in words is "thirty-one billion, two hundred one million, two hundred ten thousand, thirteen".