2123310121 has 2 divisors, whose sum is σ = 2123310122. Its totient is φ = 2123310120.

The previous prime is 2123310109. The next prime is 2123310131. The reversal of 2123310121 is 1210133212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2122905625 + 404496 = 46075^2 + 636^2 .

It is a cyclic number.

It is not a de Polignac number, because 2123310121 - 2⁵ = 2123310089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2123310095 and 2123310104.

It is not a weakly prime, because it can be changed into another prime (2123310131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061655060 + 1061655061.

It is an arithmetic number, because the mean of its divisors is an integer number (1061655061).

Almost surely, 2^2123310121 is an apocalyptic number.

It is an amenable number.

2123310121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123310121 is an equidigital number, since it uses as much as digits as its factorization.

2123310121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 2123310121 is about 46079.3893297209. The cubic root of 2123310121 is about 1285.2999084992.

Adding to 2123310121 its reverse (1210133212), we get a palindrome (3333443333).

The spelling of 2123310121 in words is "two billion, one hundred twenty-three million, three hundred ten thousand, one hundred twenty-one".