133112312031 has 4 divisors (see below), whose sum is σ = 177483082712. Its totient is φ = 88741541352.

The previous prime is 133112311999. The next prime is 133112312041. The reversal of 133112312031 is 130213211331.

It is a happy number.

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

It is not a de Polignac number, because 133112312031 - 2⁵ = 133112311999 is a prime.

It is a super-2 number, since 2×133112312031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133112311989 and 133112312007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133112312041) 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, 22185385336 + ... + 22185385341.

It is an arithmetic number, because the mean of its divisors is an integer number (44370770678).

Almost surely, 2^133112312031 is an apocalyptic number.

133112312031 is a deficient number, since it is larger than the sum of its proper divisors (44370770681).

133112312031 is an equidigital number, since it uses as much as digits as its factorization.

133112312031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44370770680.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 133112312031 its reverse (130213211331), we get a palindrome (263325523362).

The spelling of 133112312031 in words is "one hundred thirty-three billion, one hundred twelve million, three hundred twelve thousand, thirty-one".