421204219 has 2 divisors, whose sum is σ = 421204220. Its totient is φ = 421204218.

The previous prime is 421204181. The next prime is 421204229. The reversal of 421204219 is 912402124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421204219 - 2¹⁵ = 421171451 is a prime.

It is a super-2 number, since 2×421204219² = 354825988206799922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 421204193 and 421204202.

It is not a weakly prime, because it can be changed into another prime (421204229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210602109 + 210602110.

It is an arithmetic number, because the mean of its divisors is an integer number (210602110).

Almost surely, 2^421204219 is an apocalyptic number.

421204219 is a deficient number, since it is larger than the sum of its proper divisors (1).

421204219 is an equidigital number, since it uses as much as digits as its factorization.

421204219 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 421204219 is about 20523.2604378544. The cubic root of 421204219 is about 749.6022892870.

The spelling of 421204219 in words is "four hundred twenty-one million, two hundred four thousand, two hundred nineteen".