421541205445331 has 2 divisors, whose sum is σ = 421541205445332. Its totient is φ = 421541205445330.

The previous prime is 421541205445309. The next prime is 421541205445333. The reversal of 421541205445331 is 133544502145124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421541205445331 - 2¹⁴ = 421541205428947 is a prime.

It is a super-2 number, since 2×421541205445331² (a number of 30 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 421541205445333, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (421541205445333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210770602722665 + 210770602722666.

It is an arithmetic number, because the mean of its divisors is an integer number (210770602722666).

Almost surely, 2^{421541205445331} is an apocalyptic number.

421541205445331 is a deficient number, since it is larger than the sum of its proper divisors (1).

421541205445331 is an equidigital number, since it uses as much as digits as its factorization.

421541205445331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152000, while the sum is 44.

The spelling of 421541205445331 in words is "four hundred twenty-one trillion, five hundred forty-one billion, two hundred five million, four hundred forty-five thousand, three hundred thirty-one".