421392819851 has 2 divisors, whose sum is σ = 421392819852. Its totient is φ = 421392819850.

The previous prime is 421392819829. The next prime is 421392819889. The reversal of 421392819851 is 158918293124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421392819851 - 2²⁶ = 421325710987 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 421392819793 and 421392819802.

It is not a weakly prime, because it can be changed into another prime (421392819811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210696409925 + 210696409926.

It is an arithmetic number, because the mean of its divisors is an integer number (210696409926).

Almost surely, 2^421392819851 is an apocalyptic number.

421392819851 is a deficient number, since it is larger than the sum of its proper divisors (1).

421392819851 is an equidigital number, since it uses as much as digits as its factorization.

421392819851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1244160, while the sum is 53.

The spelling of 421392819851 in words is "four hundred twenty-one billion, three hundred ninety-two million, eight hundred nineteen thousand, eight hundred fifty-one".