3123122021 has 2 divisors, whose sum is σ = 3123122022. Its totient is φ = 3123122020.

The previous prime is 3123121997. The next prime is 3123122033. The reversal of 3123122021 is 1202213213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2458771396 + 664350625 = 49586^2 + 25775^2 .

It is a cyclic number.

It is not a de Polignac number, because 3123122021 - 2²⁶ = 3056013157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3123122081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1561561010 + 1561561011.

It is an arithmetic number, because the mean of its divisors is an integer number (1561561011).

Almost surely, 2^3123122021 is an apocalyptic number.

It is an amenable number.

3123122021 is a deficient number, since it is larger than the sum of its proper divisors (1).

3123122021 is an equidigital number, since it uses as much as digits as its factorization.

3123122021 is an odious number, because the sum of its binary digits is odd.

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

The square root of 3123122021 is about 55884.8997583426. The cubic root of 3123122021 is about 1461.7159440787.

Adding to 3123122021 its reverse (1202213213), we get a palindrome (4325335234).

The spelling of 3123122021 in words is "three billion, one hundred twenty-three million, one hundred twenty-two thousand, twenty-one".