131142121231221 has 12 divisors (see below), whose sum is σ = 189434096914348. Its totient is φ = 87425039988864.

The previous prime is 131142121231193. The next prime is 131142121231279. The reversal of 131142121231221 is 122132121241131.

131142121231221 is a `hidden beast` number, since 1 + 3 + 1 + 1 + 421 + 2 + 1 + 231 + 2 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 99360027202500 + 31782094028721 = 9967950^2 + 5637561^2 .

It is not a de Polignac number, because 131142121231221 - 2⁹ = 131142121230709 is a prime.

It is a super-2 number, since 2×131142121231221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131142121231421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 253129510 + ... + 253647063.

Almost surely, 2^{131142121231221} is an apocalyptic number.

It is an amenable number.

131142121231221 is a deficient number, since it is larger than the sum of its proper divisors (58291975683127).

131142121231221 is a wasteful number, since it uses less digits than its factorization.

131142121231221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506805332 (or 506805329 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

Adding to 131142121231221 its reverse (122132121241131), we get a palindrome (253274242472352).

The spelling of 131142121231221 in words is "one hundred thirty-one trillion, one hundred forty-two billion, one hundred twenty-one million, two hundred thirty-one thousand, two hundred twenty-one".