131891321001 has 8 divisors (see below), whose sum is σ = 191841921504. Its totient is φ = 79934133920.

The previous prime is 131891320973. The next prime is 131891321011. The reversal of 131891321001 is 100123198131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131891321001 - 2⁹ = 131891320489 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131891321001.

It is not an unprimeable number, because it can be changed into a prime (131891321011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1998353316 + ... + 1998353381.

It is an arithmetic number, because the mean of its divisors is an integer number (23980240188).

Almost surely, 2^131891321001 is an apocalyptic number.

131891321001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

131891321001 is a deficient number, since it is larger than the sum of its proper divisors (59950600503).

131891321001 is a wasteful number, since it uses less digits than its factorization.

131891321001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3996706711.

The product of its (nonzero) digits is 1296, while the sum is 30.

It can be divided in two parts, 1318 and 91321001, that added together give a palindrome (91322319).

The spelling of 131891321001 in words is "one hundred thirty-one billion, eight hundred ninety-one million, three hundred twenty-one thousand, one".