421392819811 has 2 divisors, whose sum is σ = 421392819812. Its totient is φ = 421392819810.

The previous prime is 421392819803. The next prime is 421392819823. The reversal of 421392819811 is 118918293124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421392819811 - 2³ = 421392819803 is a prime.

It is not a weakly prime, because it can be changed into another prime (421392819851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210696409905 + 210696409906.

It is an arithmetic number, because the mean of its divisors is an integer number (210696409906).

Almost surely, 2^421392819811 is an apocalyptic number.

421392819811 is a deficient number, since it is larger than the sum of its proper divisors (1).

421392819811 is an equidigital number, since it uses as much as digits as its factorization.

421392819811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 49.

The spelling of 421392819811 in words is "four hundred twenty-one billion, three hundred ninety-two million, eight hundred nineteen thousand, eight hundred eleven".