131023335221 has 8 divisors (see below), whose sum is σ = 138737055384. Its totient is φ = 123310333440.

The previous prime is 131023335173. The next prime is 131023335241. The reversal of 131023335221 is 122533320131.

It can be written as a sum of positive squares in 4 ways, for example, as 7654500100 + 123368835121 = 87490^2 + 351239^2 .

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-131023335221 is a prime.

It is a super-2 number, since 2×131023335221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131023335241) 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, 221531 + ... + 557783.

It is an arithmetic number, because the mean of its divisors is an integer number (17342131923).

Almost surely, 2^131023335221 is an apocalyptic number.

It is an amenable number.

131023335221 is a deficient number, since it is larger than the sum of its proper divisors (7713720163).

131023335221 is a wasteful number, since it uses less digits than its factorization.

131023335221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359191.

The product of its (nonzero) digits is 3240, while the sum is 26.

Adding to 131023335221 its reverse (122533320131), we get a palindrome (253556655352).

The spelling of 131023335221 in words is "one hundred thirty-one billion, twenty-three million, three hundred thirty-five thousand, two hundred twenty-one".