1421223203 has 4 divisors (see below), whose sum is σ = 1440692088. Its totient is φ = 1401754320.

The previous prime is 1421223197. The next prime is 1421223253. The reversal of 1421223203 is 3023221241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3023221241 = 829 ⋅3646829.

It is a cyclic number.

It is not a de Polignac number, because 1421223203 - 2⁴ = 1421223187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1421223253) 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, 9734333 + ... + 9734478.

It is an arithmetic number, because the mean of its divisors is an integer number (360173022).

Almost surely, 2^1421223203 is an apocalyptic number.

1421223203 is a deficient number, since it is larger than the sum of its proper divisors (19468885).

1421223203 is an equidigital number, since it uses as much as digits as its factorization.

1421223203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19468884.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1421223203 is about 37699.1140877342. The cubic root of 1421223203 is about 1124.3135111895.

Adding to 1421223203 its reverse (3023221241), we get a palindrome (4444444444).

The spelling of 1421223203 in words is "one billion, four hundred twenty-one million, two hundred twenty-three thousand, two hundred three".