331421130442421 has 2 divisors, whose sum is σ = 331421130442422. Its totient is φ = 331421130442420.

The previous prime is 331421130442417. The next prime is 331421130442427. The reversal of 331421130442421 is 124244031124133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 331388856319921 + 32274122500 = 18204089^2 + 179650^2 .

It is an emirp because it is prime and its reverse (124244031124133) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 331421130442421 - 2² = 331421130442417 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331421130442427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165710565221210 + 165710565221211.

It is an arithmetic number, because the mean of its divisors is an integer number (165710565221211).

Almost surely, 2^{331421130442421} is an apocalyptic number.

It is an amenable number.

331421130442421 is a deficient number, since it is larger than the sum of its proper divisors (1).

331421130442421 is an equidigital number, since it uses as much as digits as its factorization.

331421130442421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 55296, while the sum is 35.

Adding to 331421130442421 its reverse (124244031124133), we get a palindrome (455665161566554).

The spelling of 331421130442421 in words is "three hundred thirty-one trillion, four hundred twenty-one billion, one hundred thirty million, four hundred forty-two thousand, four hundred twenty-one".