2321123121 has 12 divisors (see below), whose sum is σ = 3476909072. Its totient is φ = 1547415252.

The previous prime is 2321123113. The next prime is 2321123149. The reversal of 2321123121 is 1213211232.

It is not a de Polignac number, because 2321123121 - 2³ = 2321123113 is a prime.

It is a super-2 number, since 2×2321123121² = 10775225085681561282, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2321123094 and 2321123103.

It is not an unprimeable number, because it can be changed into a prime (2321123191) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4775731 + ... + 4776216.

Almost surely, 2^2321123121 is an apocalyptic number.

It is an amenable number.

2321123121 is a deficient number, since it is larger than the sum of its proper divisors (1155785951).

2321123121 is an frugal number, since it uses more digits than its factorization.

2321123121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9551962 (or 9551950 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 2321123121 is about 48178.0356697946. The cubic root of 2321123121 is about 1324.0347774672.

Adding to 2321123121 its reverse (1213211232), we get a palindrome (3534334353).

The spelling of 2321123121 in words is "two billion, three hundred twenty-one million, one hundred twenty-three thousand, one hundred twenty-one".