131121154121323 has 4 divisors (see below), whose sum is σ = 133270681238128. Its totient is φ = 128971627004520.

The previous prime is 131121154121281. The next prime is 131121154121329. The reversal of 131121154121323 is 323121451121131.

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-131121154121323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131121154121329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1074763558311 + ... + 1074763558432.

It is an arithmetic number, because the mean of its divisors is an integer number (33317670309532).

Almost surely, 2^{131121154121323} is an apocalyptic number.

131121154121323 is a deficient number, since it is larger than the sum of its proper divisors (2149527116805).

131121154121323 is an equidigital number, since it uses as much as digits as its factorization.

131121154121323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2149527116804.

The product of its digits is 4320, while the sum is 31.

The spelling of 131121154121323 in words is "one hundred thirty-one trillion, one hundred twenty-one billion, one hundred fifty-four million, one hundred twenty-one thousand, three hundred twenty-three".