3122223121 has 2 divisors, whose sum is σ = 3122223122. Its totient is φ = 3122223120.

The previous prime is 3122223107. The next prime is 3122223157. The reversal of 3122223121 is 1213222213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2570490000 + 551733121 = 50700^2 + 23489^2 .

It is a cyclic number.

It is not a de Polignac number, because 3122223121 - 2¹¹ = 3122221073 is a prime.

It is not a weakly prime, because it can be changed into another prime (3122223101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1561111560 + 1561111561.

It is an arithmetic number, because the mean of its divisors is an integer number (1561111561).

Almost surely, 2^3122223121 is an apocalyptic number.

It is an amenable number.

3122223121 is a deficient number, since it is larger than the sum of its proper divisors (1).

3122223121 is an equidigital number, since it uses as much as digits as its factorization.

3122223121 is an odious number, because the sum of its binary digits is odd.

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

The square root of 3122223121 is about 55876.8567566215. The cubic root of 3122223121 is about 1461.5756931234.

Adding to 3122223121 its reverse (1213222213), we get a palindrome (4335445334).

The spelling of 3122223121 in words is "three billion, one hundred twenty-two million, two hundred twenty-three thousand, one hundred twenty-one".