131113233421 has 2 divisors, whose sum is σ = 131113233422. Its totient is φ = 131113233420.

The previous prime is 131113233401. The next prime is 131113233467. The reversal of 131113233421 is 124332311131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127341922500 + 3771310921 = 356850^2 + 61411^2 .

It is a cyclic number.

It is not a de Polignac number, because 131113233421 - 2⁹ = 131113232909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131113233401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65556616710 + 65556616711.

It is an arithmetic number, because the mean of its divisors is an integer number (65556616711).

Almost surely, 2^131113233421 is an apocalyptic number.

It is an amenable number.

131113233421 is a deficient number, since it is larger than the sum of its proper divisors (1).

131113233421 is an equidigital number, since it uses as much as digits as its factorization.

131113233421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 25.

Adding to 131113233421 its reverse (124332311131), we get a palindrome (255445544552).

The spelling of 131113233421 in words is "one hundred thirty-one billion, one hundred thirteen million, two hundred thirty-three thousand, four hundred twenty-one".