131221302110131 has 4 divisors (see below), whose sum is σ = 131228586939232. Its totient is φ = 131214017281032.

The previous prime is 131221302110113. The next prime is 131221302110137. The reversal of 131221302110131 is 131011203122131.

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 131221302110131 - 2¹⁵ = 131221302077363 is a prime.

It is a super-2 number, since 2×131221302110131² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131221302110137) 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, 3642387531 + ... + 3642423556.

It is an arithmetic number, because the mean of its divisors is an integer number (32807146734808).

Almost surely, 2^{131221302110131} is an apocalyptic number.

131221302110131 is a deficient number, since it is larger than the sum of its proper divisors (7284829101).

131221302110131 is an equidigital number, since it uses as much as digits as its factorization.

131221302110131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7284829100.

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 131221302110131 its reverse (131011203122131), we get a palindrome (262232505232262).

The spelling of 131221302110131 in words is "one hundred thirty-one trillion, two hundred twenty-one billion, three hundred two million, one hundred ten thousand, one hundred thirty-one".