131131221013 has 8 divisors (see below), whose sum is σ = 144222882048. Its totient is φ = 118468794864.

The previous prime is 131131220977. The next prime is 131131221017. The reversal of 131131221013 is 310122131131.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131131221013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131131221017) 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, 107308081 + ... + 107309302.

It is an arithmetic number, because the mean of its divisors is an integer number (18027860256).

Almost surely, 2^131131221013 is an apocalyptic number.

131131221013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

131131221013 is a deficient number, since it is larger than the sum of its proper divisors (13091661035).

131131221013 is a wasteful number, since it uses less digits than its factorization.

131131221013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214617443.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 131131221013 its reverse (310122131131), we get a palindrome (441253352144).

The spelling of 131131221013 in words is "one hundred thirty-one billion, one hundred thirty-one million, two hundred twenty-one thousand, thirteen".