31112133203 has 4 divisors (see below), whose sum is σ = 31113579528. Its totient is φ = 31110686880.

The previous prime is 31112133163. The next prime is 31112133251. The reversal of 31112133203 is 30233121113.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31112133203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31112133803) 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, 690401 + ... + 734082.

It is an arithmetic number, because the mean of its divisors is an integer number (7778394882).

Almost surely, 2^31112133203 is an apocalyptic number.

31112133203 is a deficient number, since it is larger than the sum of its proper divisors (1446325).

31112133203 is a wasteful number, since it uses less digits than its factorization.

31112133203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1446324.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 31112133203 its reverse (30233121113), we get a palindrome (61345254316).

The spelling of 31112133203 in words is "thirty-one billion, one hundred twelve million, one hundred thirty-three thousand, two hundred three".