131320123019 has 4 divisors (see below), whose sum is σ = 131327627880. Its totient is φ = 131312618160.

The previous prime is 131320123013. The next prime is 131320123049. The reversal of 131320123019 is 910321023131.

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 131320123019 - 2¹⁶ = 131320057483 is a prime.

It is a super-2 number, since 2×131320123019² (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 (131320123013) 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, 3726122 + ... + 3761199.

It is an arithmetic number, because the mean of its divisors is an integer number (32831906970).

Almost surely, 2^131320123019 is an apocalyptic number.

131320123019 is a deficient number, since it is larger than the sum of its proper divisors (7504861).

131320123019 is an equidigital number, since it uses as much as digits as its factorization.

131320123019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7504860.

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

The spelling of 131320123019 in words is "one hundred thirty-one billion, three hundred twenty million, one hundred twenty-three thousand, nineteen".