31122110013 has 8 divisors (see below), whose sum is σ = 41509822368. Its totient is φ = 20741235504.

The previous prime is 31122110009. The next prime is 31122110021. The reversal of 31122110013 is 31001122113.

It is a happy number.

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

It is not a de Polignac number, because 31122110013 - 2² = 31122110009 is a prime.

It is a super-2 number, since 2×31122110013² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31122109974 and 31122110001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31122110113) 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, 1698831 + ... + 1717052.

It is an arithmetic number, because the mean of its divisors is an integer number (5188727796).

Almost surely, 2^31122110013 is an apocalyptic number.

It is an amenable number.

31122110013 is a deficient number, since it is larger than the sum of its proper divisors (10387712355).

31122110013 is a wasteful number, since it uses less digits than its factorization.

31122110013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3418923.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 31122110013 its reverse (31001122113), we get a palindrome (62123232126).

The spelling of 31122110013 in words is "thirty-one billion, one hundred twenty-two million, one hundred ten thousand, thirteen".