131123121133031 has 4 divisors (see below), whose sum is σ = 132702917773272. Its totient is φ = 129543324492792.

The previous prime is 131123121133007. The next prime is 131123121133051. The reversal of 131123121133031 is 130331121321131.

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-131123121133031 is a prime.

It is a super-2 number, since 2×131123121133031² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131123121133051) 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, 789898319996 + ... + 789898320161.

It is an arithmetic number, because the mean of its divisors is an integer number (33175729443318).

Almost surely, 2^{131123121133031} is an apocalyptic number.

131123121133031 is a deficient number, since it is larger than the sum of its proper divisors (1579796640241).

131123121133031 is an equidigital number, since it uses as much as digits as its factorization.

131123121133031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1579796640240.

The product of its (nonzero) digits is 972, while the sum is 26.

Adding to 131123121133031 its reverse (130331121321131), we get a palindrome (261454242454162).

The spelling of 131123121133031 in words is "one hundred thirty-one trillion, one hundred twenty-three billion, one hundred twenty-one million, one hundred thirty-three thousand, thirty-one".