331275147421 has 2 divisors, whose sum is σ = 331275147422. Its totient is φ = 331275147420.

The previous prime is 331275147407. The next prime is 331275147433. The reversal of 331275147421 is 124741572133.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 197802562500 + 133472584921 = 444750^2 + 365339^2 .

It is a cyclic number.

It is not a de Polignac number, because 331275147421 - 2⁷ = 331275147293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331275147451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165637573710 + 165637573711.

It is an arithmetic number, because the mean of its divisors is an integer number (165637573711).

Almost surely, 2^331275147421 is an apocalyptic number.

It is an amenable number.

331275147421 is a deficient number, since it is larger than the sum of its proper divisors (1).

331275147421 is an equidigital number, since it uses as much as digits as its factorization.

331275147421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141120, while the sum is 40.

The spelling of 331275147421 in words is "three hundred thirty-one billion, two hundred seventy-five million, one hundred forty-seven thousand, four hundred twenty-one".