31122201213 has 16 divisors (see below), whose sum is σ = 46227363840. Its totient is φ = 20693954592.

The previous prime is 31122201211. The next prime is 31122201251. The reversal of 31122201213 is 31210222113.

It is not a de Polignac number, because 31122201213 - 2¹ = 31122201211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31122201211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1494456 + ... + 1515137.

It is an arithmetic number, because the mean of its divisors is an integer number (2889210240).

Almost surely, 2^31122201213 is an apocalyptic number.

It is an amenable number.

31122201213 is a deficient number, since it is larger than the sum of its proper divisors (15105162627).

31122201213 is a wasteful number, since it uses less digits than its factorization.

31122201213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3009985 (or 3009979 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 31122201213 its reverse (31210222113), we get a palindrome (62332423326).

The spelling of 31122201213 in words is "thirty-one billion, one hundred twenty-two million, two hundred one thousand, two hundred thirteen".