131231012001 has 4 divisors (see below), whose sum is σ = 174974682672. Its totient is φ = 87487341332.

The previous prime is 131231011969. The next prime is 131231012021. The reversal of 131231012001 is 100210132131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 131231012001 - 2⁵ = 131231011969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131231012021) 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, 21871835331 + ... + 21871835336.

It is an arithmetic number, because the mean of its divisors is an integer number (43743670668).

Almost surely, 2^131231012001 is an apocalyptic number.

It is an amenable number.

131231012001 is a deficient number, since it is larger than the sum of its proper divisors (43743670671).

131231012001 is an equidigital number, since it uses as much as digits as its factorization.

131231012001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43743670670.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 131231012001 its reverse (100210132131), we get a palindrome (231441144132).

The spelling of 131231012001 in words is "one hundred thirty-one billion, two hundred thirty-one million, twelve thousand, one".