421012223 has 4 divisors (see below), whose sum is σ = 421054848. Its totient is φ = 420969600.

The previous prime is 421012219. The next prime is 421012237. The reversal of 421012223 is 322210124.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 421012223 - 2² = 421012219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421012213) 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, 2015 + ... + 29087.

It is an arithmetic number, because the mean of its divisors is an integer number (105263712).

Almost surely, 2^421012223 is an apocalyptic number.

421012223 is a deficient number, since it is larger than the sum of its proper divisors (42625).

421012223 is a wasteful number, since it uses less digits than its factorization.

421012223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42624.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 421012223 is about 20518.5823828061. The cubic root of 421012223 is about 749.4883758077.

Adding to 421012223 its reverse (322210124), we get a palindrome (743222347).

The spelling of 421012223 in words is "four hundred twenty-one million, twelve thousand, two hundred twenty-three".