133111213031 has 4 divisors (see below), whose sum is σ = 133112029512. Its totient is φ = 133110396552.

The previous prime is 133111213019. The next prime is 133111213063. The reversal of 133111213031 is 130312111331.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 130312111331 = 43 ⋅3030514217.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133111213031 is a prime.

It is a super-2 number, since 2×133111213031² (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 = 133111212994 and 133111213012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133111213091) 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, 70625 + ... + 520778.

It is an arithmetic number, because the mean of its divisors is an integer number (33278007378).

Almost surely, 2^133111213031 is an apocalyptic number.

133111213031 is a deficient number, since it is larger than the sum of its proper divisors (816481).

133111213031 is an equidigital number, since it uses as much as digits as its factorization.

133111213031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816480.

The product of its (nonzero) digits is 162, while the sum is 20.

Adding to 133111213031 its reverse (130312111331), we get a palindrome (263423324362).

The spelling of 133111213031 in words is "one hundred thirty-three billion, one hundred eleven million, two hundred thirteen thousand, thirty-one".