2123303121 has 48 divisors (see below), whose sum is σ = 3391839360. Its totient is φ = 1275267840.

The previous prime is 2123303113. The next prime is 2123303123. The reversal of 2123303121 is 1213033212.

2123303121 is a `hidden beast` number, since 21 + 2 + 330 + 312 + 1 = 666.

It is not a de Polignac number, because 2123303121 - 2³ = 2123303113 is a prime.

It is a super-2 number, since 2×2123303121² = 9016832287296681282, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2123303094 and 2123303103.

It is not an unprimeable number, because it can be changed into a prime (2123303123) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 241810 + ... + 250436.

It is an arithmetic number, because the mean of its divisors is an integer number (70663320).

Almost surely, 2^2123303121 is an apocalyptic number.

It is an amenable number.

2123303121 is a deficient number, since it is larger than the sum of its proper divisors (1268536239).

2123303121 is a wasteful number, since it uses less digits than its factorization.

2123303121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8726 (or 8723 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 2123303121 is about 46079.3133737906. The cubic root of 2123303121 is about 1285.2984960647.

Adding to 2123303121 its reverse (1213033212), we get a palindrome (3336336333).

The spelling of 2123303121 in words is "two billion, one hundred twenty-three million, three hundred three thousand, one hundred twenty-one".