31133221211213 has 12 divisors (see below), whose sum is σ = 35708674852704. Its totient is φ = 27072366268200.

The previous prime is 31133221211207. The next prime is 31133221211221. The reversal of 31133221211213 is 31211212233113.

It is not a de Polignac number, because 31133221211213 - 2³² = 31128926243917 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 (31133221211233) 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, 5593461323 + ... + 5593466888.

It is an arithmetic number, because the mean of its divisors is an integer number (2975722904392).

Almost surely, 2^{31133221211213} is an apocalyptic number.

It is an amenable number.

31133221211213 is a deficient number, since it is larger than the sum of its proper divisors (4575453641491).

31133221211213 is a wasteful number, since it uses less digits than its factorization.

31133221211213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11186928256 (or 11186928245 counting only the distinct ones).

The product of its digits is 1296, while the sum is 26.

Adding to 31133221211213 its reverse (31211212233113), we get a palindrome (62344433444326).

The spelling of 31133221211213 in words is "thirty-one trillion, one hundred thirty-three billion, two hundred twenty-one million, two hundred eleven thousand, two hundred thirteen".