133111100131 has 4 divisors (see below), whose sum is σ = 133283301552. Its totient is φ = 132938898712.

The previous prime is 133111100107. The next prime is 133111100147. The reversal of 133111100131 is 131001111331.

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

It is a cyclic number.

It is not a de Polignac number, because 133111100131 - 2⁵ = 133111100099 is a prime.

It is a super-2 number, since 2×133111100131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133111100831) 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, 86099551 + ... + 86101096.

It is an arithmetic number, because the mean of its divisors is an integer number (33320825388).

Almost surely, 2^133111100131 is an apocalyptic number.

133111100131 is a deficient number, since it is larger than the sum of its proper divisors (172201421).

133111100131 is an equidigital number, since it uses as much as digits as its factorization.

133111100131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172201420.

The product of its (nonzero) digits is 27, while the sum is 16.

Adding to 133111100131 its reverse (131001111331), we get a palindrome (264112211462).

The spelling of 133111100131 in words is "one hundred thirty-three billion, one hundred eleven million, one hundred thousand, one hundred thirty-one".