31012211133 has 6 divisors (see below), whose sum is σ = 44795416094. Its totient is φ = 20674807416.

The previous prime is 31012211119. The next prime is 31012211137. The reversal of 31012211133 is 33111221013.

31012211133 is a `hidden beast` number, since 310 + 1 + 221 + 1 + 133 = 666.

It can be written as a sum of positive squares in only one way, i.e., 29404361529 + 1607849604 = 171477^2 + 40098^2 .

It is not a de Polignac number, because 31012211133 - 2⁸ = 31012210877 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 (31012211137) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1722900610 + ... + 1722900627.

Almost surely, 2^31012211133 is an apocalyptic number.

It is an amenable number.

31012211133 is a deficient number, since it is larger than the sum of its proper divisors (13783204961).

31012211133 is a wasteful number, since it uses less digits than its factorization.

31012211133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3445801243 (or 3445801240 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 31012211133 its reverse (33111221013), we get a palindrome (64123432146).

The spelling of 31012211133 in words is "thirty-one billion, twelve million, two hundred eleven thousand, one hundred thirty-three".