421402211 has 4 divisors (see below), whose sum is σ = 421473624. Its totient is φ = 421330800.

The previous prime is 421402153. The next prime is 421402217. The reversal of 421402211 is 112204124.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 421402211 - 2⁶ = 421402147 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 421402211.

It is not an unprimeable number, because it can be changed into a prime (421402217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25970 + ... + 38951.

It is an arithmetic number, because the mean of its divisors is an integer number (105368406).

Almost surely, 2^421402211 is an apocalyptic number.

421402211 is a deficient number, since it is larger than the sum of its proper divisors (71413).

421402211 is an equidigital number, since it uses as much as digits as its factorization.

421402211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71412.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 421402211 is about 20528.0834711865. The cubic root of 421402211 is about 749.7197240143.

Adding to 421402211 its reverse (112204124), we get a palindrome (533606335).

The spelling of 421402211 in words is "four hundred twenty-one million, four hundred two thousand, two hundred eleven".