31212301013 has 4 divisors (see below), whose sum is σ = 31678156320. Its totient is φ = 30746445708.

The previous prime is 31212300961. The next prime is 31212301027. The reversal of 31212301013 is 31010321213.

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 31212301013 - 2²⁰ = 31211252437 is a prime.

It is a super-2 number, since 2×31212301013² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31212300982 and 31212301000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31212301093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 232927553 + ... + 232927686.

It is an arithmetic number, because the mean of its divisors is an integer number (7919539080).

Almost surely, 2^31212301013 is an apocalyptic number.

It is an amenable number.

31212301013 is a deficient number, since it is larger than the sum of its proper divisors (465855307).

31212301013 is an equidigital number, since it uses as much as digits as its factorization.

31212301013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465855306.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 31212301013 its reverse (31010321213), we get a palindrome (62222622226).

The spelling of 31212301013 in words is "thirty-one billion, two hundred twelve million, three hundred one thousand, thirteen".