421222101 has 4 divisors (see below), whose sum is σ = 561629472. Its totient is φ = 280814732.

The previous prime is 421222093. The next prime is 421222103. The reversal of 421222101 is 101222124.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 421222101 - 2³ = 421222093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421222103) 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, 70203681 + ... + 70203686.

It is an arithmetic number, because the mean of its divisors is an integer number (140407368).

Almost surely, 2^421222101 is an apocalyptic number.

It is an amenable number.

421222101 is a deficient number, since it is larger than the sum of its proper divisors (140407371).

421222101 is a wasteful number, since it uses less digits than its factorization.

421222101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140407370.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 421222101 is about 20523.6960852572. The cubic root of 421222101 is about 749.6128971251.

Adding to 421222101 its reverse (101222124), we get a palindrome (522444225).

The spelling of 421222101 in words is "four hundred twenty-one million, two hundred twenty-two thousand, one hundred one".