421003111 has 4 divisors (see below), whose sum is σ = 429960672. Its totient is φ = 412045552.

The previous prime is 421003081. The next prime is 421003123. The reversal of 421003111 is 111300124.

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 421003111 - 2²⁷ = 286785383 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421003091 and 421003100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421003171) 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, 4478710 + ... + 4478803.

It is an arithmetic number, because the mean of its divisors is an integer number (107490168).

Almost surely, 2^421003111 is an apocalyptic number.

421003111 is a deficient number, since it is larger than the sum of its proper divisors (8957561).

421003111 is an equidigital number, since it uses as much as digits as its factorization.

421003111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8957560.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 421003111 is about 20518.3603389745. The cubic root of 421003111 is about 749.4829686904.

Adding to 421003111 its reverse (111300124), we get a palindrome (532303235).

The spelling of 421003111 in words is "four hundred twenty-one million, three thousand, one hundred eleven".