421433404421291 has 2 divisors, whose sum is σ = 421433404421292. Its totient is φ = 421433404421290.

The previous prime is 421433404421273. The next prime is 421433404421399. The reversal of 421433404421291 is 192124404334124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421433404421291 - 2³⁰ = 421432330679467 is a prime.

It is a super-2 number, since 2×421433404421291² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (421433404421251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210716702210645 + 210716702210646.

It is an arithmetic number, because the mean of its divisors is an integer number (210716702210646).

Almost surely, 2^{421433404421291} is an apocalyptic number.

421433404421291 is a deficient number, since it is larger than the sum of its proper divisors (1).

421433404421291 is an equidigital number, since it uses as much as digits as its factorization.

421433404421291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 663552, while the sum is 44.

The spelling of 421433404421291 in words is "four hundred twenty-one trillion, four hundred thirty-three billion, four hundred four million, four hundred twenty-one thousand, two hundred ninety-one".