3123022121 has 4 divisors (see below), whose sum is σ = 3130268544. Its totient is φ = 3115775700.

The previous prime is 3123022081. The next prime is 3123022141. The reversal of 3123022121 is 1212203213.

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 a de Polignac number, because none of the positive numbers 2^k-3123022121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3123022121.

It is not an unprimeable number, because it can be changed into a prime (3123022141) 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, 3622565 + ... + 3623426.

It is an arithmetic number, because the mean of its divisors is an integer number (782567136).

Almost surely, 2^3123022121 is an apocalyptic number.

It is an amenable number.

3123022121 is a deficient number, since it is larger than the sum of its proper divisors (7246423).

3123022121 is an equidigital number, since it uses as much as digits as its factorization.

3123022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7246422.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 3123022121 is about 55884.0059498243. The cubic root of 3123022121 is about 1461.7003585014.

Adding to 3123022121 its reverse (1212203213), we get a palindrome (4335225334).

The spelling of 3123022121 in words is "three billion, one hundred twenty-three million, twenty-two thousand, one hundred twenty-one".