3123322421 has 4 divisors (see below), whose sum is σ = 3259119072. Its totient is φ = 2987525772.

The previous prime is 3123322291. The next prime is 3123322439. The reversal of 3123322421 is 1242233213.

3123322421 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 Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1242233213 = 13 ⋅95556401.

It is a cyclic number.

It is not a de Polignac number, because 3123322421 - 2¹⁴ = 3123306037 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 135796627 = 3123322421 / (3 + 1 + 2 + 3 + 3 + 2 + 2 + 4 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3123322441) 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, 67898291 + ... + 67898336.

It is an arithmetic number, because the mean of its divisors is an integer number (814779768).

Almost surely, 2^3123322421 is an apocalyptic number.

It is an amenable number.

3123322421 is a deficient number, since it is larger than the sum of its proper divisors (135796651).

3123322421 is a wasteful number, since it uses less digits than its factorization.

3123322421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135796650.

The product of its digits is 1728, while the sum is 23.

The square root of 3123322421 is about 55886.6927004989. The cubic root of 3123322421 is about 1461.7472078385.

Adding to 3123322421 its reverse (1242233213), we get a palindrome (4365555634).

The spelling of 3123322421 in words is "three billion, one hundred twenty-three million, three hundred twenty-two thousand, four hundred twenty-one".