31112133211001 has 4 divisors (see below), whose sum is σ = 31112203708404. Its totient is φ = 31112062713600.

The previous prime is 31112133210973. The next prime is 31112133211007. The reversal of 31112133211001 is 10011233121113.

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 2535100840000 + 28577032371001 = 1592200^2 + 5345749^2 .

It is a cyclic number.

It is not a de Polignac number, because 31112133211001 - 2¹⁴ = 31112133194617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31112133211007) 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, 34582520 + ... + 35470761.

It is an arithmetic number, because the mean of its divisors is an integer number (7778050927101).

Almost surely, 2^{31112133211001} is an apocalyptic number.

It is an amenable number.

31112133211001 is a deficient number, since it is larger than the sum of its proper divisors (70497403).

31112133211001 is an equidigital number, since it uses as much as digits as its factorization.

31112133211001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70497402.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 31112133211001 its reverse (10011233121113), we get a palindrome (41123366332114).

The spelling of 31112133211001 in words is "thirty-one trillion, one hundred twelve billion, one hundred thirty-three million, two hundred eleven thousand, one".