31211055232111 has 12 divisors (see below), whose sum is σ = 31604863458168. Its totient is φ = 30821822119952.

The previous prime is 31211055232103. The next prime is 31211055232141. The reversal of 31211055232111 is 11123255011213.

It is a happy number.

It is not a de Polignac number, because 31211055232111 - 2³ = 31211055232103 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31211055232111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31211055232141) 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, 670501 + ... + 7929166.

It is an arithmetic number, because the mean of its divisors is an integer number (2633738621514).

Almost surely, 2^{31211055232111} is an apocalyptic number.

31211055232111 is a deficient number, since it is larger than the sum of its proper divisors (393808226057).

31211055232111 is an equidigital number, since it uses as much as digits as its factorization.

31211055232111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8600198 (or 8600091 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 28.

The spelling of 31211055232111 in words is "thirty-one trillion, two hundred eleven billion, fifty-five million, two hundred thirty-two thousand, one hundred eleven".