31231122101993 has 32 divisors (see below), whose sum is σ = 36594357085440. Its totient is φ = 26336943360000.

The previous prime is 31231122101981. The next prime is 31231122102017. The reversal of 31231122101993 is 39910122113213.

It is a cyclic number.

It is not a de Polignac number, because 31231122101993 - 2¹⁴ = 31231122085609 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31231122101093) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40899893 + ... + 41656493.

It is an arithmetic number, because the mean of its divisors is an integer number (1143573658920).

Almost surely, 2^{31231122101993} is an apocalyptic number.

It is an amenable number.

31231122101993 is a deficient number, since it is larger than the sum of its proper divisors (5363234983447).

31231122101993 is a wasteful number, since it uses less digits than its factorization.

31231122101993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 759809.

The product of its (nonzero) digits is 17496, while the sum is 38.

The spelling of 31231122101993 in words is "thirty-one trillion, two hundred thirty-one billion, one hundred twenty-two million, one hundred one thousand, nine hundred ninety-three".