31320322031213 has 12 divisors (see below), whose sum is σ = 33692221525440. Its totient is φ = 29104811516352.

The previous prime is 31320322031209. The next prime is 31320322031261. The reversal of 31320322031213 is 31213022302313.

It is not a de Polignac number, because 31320322031213 - 2² = 31320322031209 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 (31320322031263) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 685893731 + ... + 685939392.

It is an arithmetic number, because the mean of its divisors is an integer number (2807685127120).

Almost surely, 2^{31320322031213} is an apocalyptic number.

It is an amenable number.

31320322031213 is a deficient number, since it is larger than the sum of its proper divisors (2371899494227).

31320322031213 is a wasteful number, since it uses less digits than its factorization.

31320322031213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1371833236 (or 1371833219 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 31320322031213 its reverse (31213022302313), we get a palindrome (62533344333526).

The spelling of 31320322031213 in words is "thirty-one trillion, three hundred twenty billion, three hundred twenty-two million, thirty-one thousand, two hundred thirteen".