2123121033 has 24 divisors (see below), whose sum is σ = 3347300736. Its totient is φ = 1286056800.

The previous prime is 2123121017. The next prime is 2123121067. The reversal of 2123121033 is 3301213212.

It is not a de Polignac number, because 2123121033 - 2⁴ = 2123121017 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2123120997 and 2123121015.

It is not an unprimeable number, because it can be changed into a prime (2123121073) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 231216 + ... + 240222.

It is an arithmetic number, because the mean of its divisors is an integer number (139470864).

Almost surely, 2^2123121033 is an apocalyptic number.

It is an amenable number.

2123121033 is a deficient number, since it is larger than the sum of its proper divisors (1224179703).

2123121033 is a wasteful number, since it uses less digits than its factorization.

2123121033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11405 (or 11402 counting only the distinct ones).

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

The square root of 2123121033 is about 46077.3375207379. The cubic root of 2123121033 is about 1285.2617539213.

Adding to 2123121033 its reverse (3301213212), we get a palindrome (5424334245).

The spelling of 2123121033 in words is "two billion, one hundred twenty-three million, one hundred twenty-one thousand, thirty-three".