421233123 has 16 divisors (see below), whose sum is σ = 610757280. Its totient is φ = 257158656.

The previous prime is 421233103. The next prime is 421233133. The reversal of 421233123 is 321332124.

It is not a de Polignac number, because 421233123 - 2²⁰ = 420184547 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 421233123.

It is not an unprimeable number, because it can be changed into a prime (421233103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109728 + ... + 113501.

It is an arithmetic number, because the mean of its divisors is an integer number (38172330).

Almost surely, 2^421233123 is an apocalyptic number.

421233123 is a deficient number, since it is larger than the sum of its proper divisors (189524157).

421233123 is a wasteful number, since it uses less digits than its factorization.

421233123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223286.

The product of its digits is 864, while the sum is 21.

The square root of 421233123 is about 20523.9646023862. The cubic root of 421233123 is about 749.6194353712.

Adding to 421233123 its reverse (321332124), we get a palindrome (742565247).

Subtracting from 421233123 its reverse (321332124), we obtain a palindrome (99900999).

The spelling of 421233123 in words is "four hundred twenty-one million, two hundred thirty-three thousand, one hundred twenty-three".