3121421203 has 4 divisors (see below), whose sum is σ = 3121541680. Its totient is φ = 3121300728.

The previous prime is 3121421197. The next prime is 3121421207. The reversal of 3121421203 is 3021241213.

It is a happy number.

3121421203 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 3121421203 - 2¹⁷ = 3121290131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3121421207) 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, 3663 + ... + 79096.

It is an arithmetic number, because the mean of its divisors is an integer number (780385420).

Almost surely, 2^3121421203 is an apocalyptic number.

3121421203 is a deficient number, since it is larger than the sum of its proper divisors (120477).

3121421203 is an equidigital number, since it uses as much as digits as its factorization.

3121421203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120476.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 3121421203 is about 55869.6805342576. The cubic root of 3121421203 is about 1461.4505510723.

Adding to 3121421203 its reverse (3021241213), we get a palindrome (6142662416).

The spelling of 3121421203 in words is "three billion, one hundred twenty-one million, four hundred twenty-one thousand, two hundred three".