1002203421 has 4 divisors (see below), whose sum is σ = 1336271232. Its totient is φ = 668135612.

The previous prime is 1002203413. The next prime is 1002203491. The reversal of 1002203421 is 1243022001.

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 1002203421 - 2³ = 1002203413 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1002203421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002203491) 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, 167033901 + ... + 167033906.

It is an arithmetic number, because the mean of its divisors is an integer number (334067808).

Almost surely, 2^1002203421 is an apocalyptic number.

It is an amenable number.

1002203421 is a deficient number, since it is larger than the sum of its proper divisors (334067811).

1002203421 is an equidigital number, since it uses as much as digits as its factorization.

1002203421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334067810.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 1002203421 is about 31657.5965764933. The cubic root of 1002203421 is about 1000.7339348745.

Adding to 1002203421 its reverse (1243022001), we get a palindrome (2245225422).

The spelling of 1002203421 in words is "one billion, two million, two hundred three thousand, four hundred twenty-one".