31204321102013 has 4 divisors (see below), whose sum is σ = 32561030715168. Its totient is φ = 29847611488860.

The previous prime is 31204321101973. The next prime is 31204321102027. The reversal of 31204321102013 is 31020112340213.

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 31204321102013 - 2⁸ = 31204321101757 is a prime.

It is a super-3 number, since 3×31204321102013³ (a number of 41 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 1356709613131 = 31204321102013 / (3 + 1 + 2 + 0 + 4 + 3 + 2 + 1 + 1 + 0 + 2 + 0 + 1 + 3).

It is a self number, because there is not a number n which added to its sum of digits gives 31204321102013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31204321102043) 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, 678354806543 + ... + 678354806588.

It is an arithmetic number, because the mean of its divisors is an integer number (8140257678792).

Almost surely, 2^{31204321102013} is an apocalyptic number.

It is an amenable number.

31204321102013 is a deficient number, since it is larger than the sum of its proper divisors (1356709613155).

31204321102013 is a wasteful number, since it uses less digits than its factorization.

31204321102013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1356709613154.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 31204321102013 its reverse (31020112340213), we get a palindrome (62224433442226).

The spelling of 31204321102013 in words is "thirty-one trillion, two hundred four billion, three hundred twenty-one million, one hundred two thousand, thirteen".