3123204121 has 4 divisors (see below), whose sum is σ = 3143887744. Its totient is φ = 3102520500.

The previous prime is 3123204101. The next prime is 3123204167. The reversal of 3123204121 is 1214023213.

It is a happy number.

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 3123204121 - 2²³ = 3114815513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3123204101) 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, 10341585 + ... + 10341886.

It is an arithmetic number, because the mean of its divisors is an integer number (785971936).

Almost surely, 2^3123204121 is an apocalyptic number.

It is an amenable number.

3123204121 is a deficient number, since it is larger than the sum of its proper divisors (20683623).

3123204121 is a wasteful number, since it uses less digits than its factorization.

3123204121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20683622.

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

The square root of 3123204121 is about 55885.6342989860. The cubic root of 3123204121 is about 1461.7287523975.

Adding to 3123204121 its reverse (1214023213), we get a palindrome (4337227334).

The spelling of 3123204121 in words is "three billion, one hundred twenty-three million, two hundred four thousand, one hundred twenty-one".