131221121122131 has 16 divisors (see below), whose sum is σ = 175015464099840. Its totient is φ = 87453764386560.

The previous prime is 131221121122129. The next prime is 131221121122153.

131221121122131 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 131221121122131 - 2¹ = 131221121122129 is a prime.

It is a super-2 number, since 2×131221121122131² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (131221121142131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 359210190 + ... + 359575308.

It is an arithmetic number, because the mean of its divisors is an integer number (10938466506240).

Almost surely, 2^{131221121122131} is an apocalyptic number.

131221121122131 is a deficient number, since it is larger than the sum of its proper divisors (43794342977709).

131221121122131 is a wasteful number, since it uses less digits than its factorization.

131221121122131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401746.

The product of its digits is 288, while the sum is 24.

The spelling of 131221121122131 in words is "one hundred thirty-one trillion, two hundred twenty-one billion, one hundred twenty-one million, one hundred twenty-two thousand, one hundred thirty-one".