31231212013303 has 4 divisors (see below), whose sum is σ = 31231343302848. Its totient is φ = 31231080723760.

The previous prime is 31231212013291. The next prime is 31231212013343. The reversal of 31231212013303 is 30331021213213.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31231212013303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31231212013343) 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, 65287303 + ... + 65763928.

It is an arithmetic number, because the mean of its divisors is an integer number (7807835825712).

Almost surely, 2^{31231212013303} is an apocalyptic number.

31231212013303 is a deficient number, since it is larger than the sum of its proper divisors (131289545).

31231212013303 is a wasteful number, since it uses less digits than its factorization.

31231212013303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131289544.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 31231212013303 its reverse (30331021213213), we get a palindrome (61562233226516).

The spelling of 31231212013303 in words is "thirty-one trillion, two hundred thirty-one billion, two hundred twelve million, thirteen thousand, three hundred three".