31113312211209 has 8 divisors (see below), whose sum is σ = 41642151705792. Its totient is φ = 20663340428720.

The previous prime is 31113312211181. The next prime is 31113312211213. The reversal of 31113312211209 is 90211221331113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31113312211209 - 2²¹ = 31113310114057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31113312291209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19716927102 + ... + 19716928679.

It is an arithmetic number, because the mean of its divisors is an integer number (5205268963224).

Almost surely, 2^{31113312211209} is an apocalyptic number.

It is an amenable number.

31113312211209 is a deficient number, since it is larger than the sum of its proper divisors (10528839494583).

31113312211209 is a wasteful number, since it uses less digits than its factorization.

31113312211209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39433856047.

The product of its (nonzero) digits is 1944, while the sum is 30.

The spelling of 31113312211209 in words is "thirty-one trillion, one hundred thirteen billion, three hundred twelve million, two hundred eleven thousand, two hundred nine".