31321212313 has 8 divisors (see below), whose sum is σ = 31880401920. Its totient is φ = 30766906800.

The previous prime is 31321212311. The next prime is 31321212347.

31321212313 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31321212313 - 2¹ = 31321212311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31321212311) 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 7 ways as a sum of consecutive naturals, for example, 1208083 + ... + 1233736.

It is an arithmetic number, because the mean of its divisors is an integer number (3985050240).

Almost surely, 2^31321212313 is an apocalyptic number.

It is an amenable number.

31321212313 is a deficient number, since it is larger than the sum of its proper divisors (559189607).

31321212313 is a wasteful number, since it uses less digits than its factorization.

31321212313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2442047.

The product of its digits is 648, while the sum is 22.

The spelling of 31321212313 in words is "thirty-one billion, three hundred twenty-one million, two hundred twelve thousand, three hundred thirteen".