421049795851 has 2 divisors, whose sum is σ = 421049795852. Its totient is φ = 421049795850.

The previous prime is 421049795843. The next prime is 421049795923. The reversal of 421049795851 is 158597940124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421049795851 - 2³ = 421049795843 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 421049795792 and 421049795801.

It is not a weakly prime, because it can be changed into another prime (421049795951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210524897925 + 210524897926.

It is an arithmetic number, because the mean of its divisors is an integer number (210524897926).

Almost surely, 2^421049795851 is an apocalyptic number.

421049795851 is a deficient number, since it is larger than the sum of its proper divisors (1).

421049795851 is an equidigital number, since it uses as much as digits as its factorization.

421049795851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3628800, while the sum is 55.

The spelling of 421049795851 in words is "four hundred twenty-one billion, forty-nine million, seven hundred ninety-five thousand, eight hundred fifty-one".