131321203030021 has 2 divisors, whose sum is σ = 131321203030022. Its totient is φ = 131321203030020.

The previous prime is 131321203029997. The next prime is 131321203030051. The reversal of 131321203030021 is 120030302123131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128373749285796 + 2947453744225 = 11330214^2 + 1716815^2 .

It is a cyclic number.

It is not a de Polignac number, because 131321203030021 - 2⁷ = 131321203029893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131321203029974 and 131321203030001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131321203030051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65660601515010 + 65660601515011.

It is an arithmetic number, because the mean of its divisors is an integer number (65660601515011).

Almost surely, 2^{131321203030021} is an apocalyptic number.

It is an amenable number.

131321203030021 is a deficient number, since it is larger than the sum of its proper divisors (1).

131321203030021 is an equidigital number, since it uses as much as digits as its factorization.

131321203030021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 131321203030021 its reverse (120030302123131), we get a palindrome (251351505153152).

The spelling of 131321203030021 in words is "one hundred thirty-one trillion, three hundred twenty-one billion, two hundred three million, thirty thousand, twenty-one".