421222007 has 2 divisors, whose sum is σ = 421222008. Its totient is φ = 421222006.

The previous prime is 421221979. The next prime is 421222093. The reversal of 421222007 is 700222124.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421222007 - 2¹⁰ = 421220983 is a prime.

It is a super-2 number, since 2×421222007² = 354855958362216098, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 421222007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421221007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210611003 + 210611004.

It is an arithmetic number, because the mean of its divisors is an integer number (210611004).

Almost surely, 2^421222007 is an apocalyptic number.

421222007 is a deficient number, since it is larger than the sum of its proper divisors (1).

421222007 is an equidigital number, since it uses as much as digits as its factorization.

421222007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 421222007 is about 20523.6937952212. The cubic root of 421222007 is about 749.6128413638.

The spelling of 421222007 in words is "four hundred twenty-one million, two hundred twenty-two thousand, seven".