131023302121 has 4 divisors (see below), whose sum is σ = 131030828500. Its totient is φ = 131015775744.

The previous prime is 131023302103. The next prime is 131023302127. The reversal of 131023302121 is 121203320131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 119723612121 + 11299690000 = 346011^2 + 106300^2 .

It is a cyclic number.

It is not a de Polignac number, because 131023302121 - 2⁵ = 131023302089 is a prime.

It is a super-3 number, since 3×131023302121³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131023302127) 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, 3737016 + ... + 3771913.

It is an arithmetic number, because the mean of its divisors is an integer number (32757707125).

Almost surely, 2^131023302121 is an apocalyptic number.

It is an amenable number.

131023302121 is a deficient number, since it is larger than the sum of its proper divisors (7526379).

131023302121 is an equidigital number, since it uses as much as digits as its factorization.

131023302121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7526378.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 131023302121 its reverse (121203320131), we get a palindrome (252226622252).

The spelling of 131023302121 in words is "one hundred thirty-one billion, twenty-three million, three hundred two thousand, one hundred twenty-one".