31211031122093 has 4 divisors (see below), whose sum is σ = 31241600203548. Its totient is φ = 31180462040640.

The previous prime is 31211031122071. The next prime is 31211031122099. The reversal of 31211031122093 is 39022113011213.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23231609526724 + 7979421595369 = 4819918^2 + 2824787^2 .

It is a cyclic number.

It is not a de Polignac number, because 31211031122093 - 2²² = 31211026927789 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 (31211031122099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15284539196 + ... + 15284541237.

It is an arithmetic number, because the mean of its divisors is an integer number (7810400050887).

Almost surely, 2^{31211031122093} is an apocalyptic number.

It is an amenable number.

31211031122093 is a deficient number, since it is larger than the sum of its proper divisors (30569081455).

31211031122093 is a wasteful number, since it uses less digits than its factorization.

31211031122093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30569081454.

The product of its (nonzero) digits is 1944, while the sum is 29.

The spelling of 31211031122093 in words is "thirty-one trillion, two hundred eleven billion, thirty-one million, one hundred twenty-two thousand, ninety-three".