3123122421 has 4 divisors (see below), whose sum is σ = 4164163232. Its totient is φ = 2082081612.

The previous prime is 3123122417. The next prime is 3123122437. The reversal of 3123122421 is 1242213213.

3123122421 is digitally balanced in base 2 and base 4, because in such bases 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.

It is not a de Polignac number, because 3123122421 - 2² = 3123122417 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3123122441) 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, 520520401 + ... + 520520406.

It is an arithmetic number, because the mean of its divisors is an integer number (1041040808).

Almost surely, 2^3123122421 is an apocalyptic number.

It is an amenable number.

3123122421 is a deficient number, since it is larger than the sum of its proper divisors (1041040811).

3123122421 is a wasteful number, since it uses less digits than its factorization.

3123122421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041040810.

The product of its digits is 576, while the sum is 21.

The square root of 3123122421 is about 55884.9033371267. The cubic root of 3123122421 is about 1461.7160064828.

Adding to 3123122421 its reverse (1242213213), we get a palindrome (4365335634).

The spelling of 3123122421 in words is "three billion, one hundred twenty-three million, one hundred twenty-two thousand, four hundred twenty-one".