2122127321 has 2 divisors, whose sum is σ = 2122127322. Its totient is φ = 2122127320.

The previous prime is 2122127311. The next prime is 2122127327. The reversal of 2122127321 is 1237212212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2121892096 + 235225 = 46064^2 + 485^2 .

It is a cyclic number.

It is not a de Polignac number, because 2122127321 - 2⁶ = 2122127257 is a prime.

It is not a weakly prime, because it can be changed into another prime (2122127327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061063660 + 1061063661.

It is an arithmetic number, because the mean of its divisors is an integer number (1061063661).

Almost surely, 2^2122127321 is an apocalyptic number.

It is an amenable number.

2122127321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2122127321 is an equidigital number, since it uses as much as digits as its factorization.

2122127321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 672, while the sum is 23.

The square root of 2122127321 is about 46066.5531703860. The cubic root of 2122127321 is about 1285.0612033610.

Adding to 2122127321 its reverse (1237212212), we get a palindrome (3359339533).

The spelling of 2122127321 in words is "two billion, one hundred twenty-two million, one hundred twenty-seven thousand, three hundred twenty-one".