31003122213 has 12 divisors (see below), whose sum is σ = 51179757408. Its totient is φ = 17716069800.

The previous prime is 31003122193. The next prime is 31003122221. The reversal of 31003122213 is 31222130013.

It is not a de Polignac number, because 31003122213 - 2²⁰ = 31002073637 is a prime.

It is a super-2 number, since 2×31003122213² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31003122223) 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, 246056463 + ... + 246056588.

It is an arithmetic number, because the mean of its divisors is an integer number (4264979784).

Almost surely, 2^31003122213 is an apocalyptic number.

It is an amenable number.

31003122213 is a deficient number, since it is larger than the sum of its proper divisors (20176635195).

31003122213 is a wasteful number, since it uses less digits than its factorization.

31003122213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492113064 (or 492113061 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 31003122213 its reverse (31222130013), we get a palindrome (62225252226).

The spelling of 31003122213 in words is "thirty-one billion, three million, one hundred twenty-two thousand, two hundred thirteen".