31213301213 has 8 divisors (see below), whose sum is σ = 32978253600. Its totient is φ = 29460563568.

The previous prime is 31213301179. The next prime is 31213301233. The reversal of 31213301213 is 31210331213.

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 31213301213 - 2¹⁰ = 31213300189 is a prime.

It is a super-2 number, since 2×31213301213² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31213301233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3048431 + ... + 3058652.

It is an arithmetic number, because the mean of its divisors is an integer number (4122281700).

Almost surely, 2^31213301213 is an apocalyptic number.

It is an amenable number.

31213301213 is a deficient number, since it is larger than the sum of its proper divisors (1764952387).

31213301213 is a wasteful number, since it uses less digits than its factorization.

31213301213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6107371.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 31213301213 its reverse (31210331213), we get a palindrome (62423632426).

The spelling of 31213301213 in words is "thirty-one billion, two hundred thirteen million, three hundred one thousand, two hundred thirteen".