2121011233 has 4 divisors (see below), whose sum is σ = 2313830448. Its totient is φ = 1928192020.

The previous prime is 2121011201. The next prime is 2121011281. The reversal of 2121011233 is 3321101212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2121011233 - 2⁵ = 2121011201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121011833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96409591 + ... + 96409612.

It is an arithmetic number, because the mean of its divisors is an integer number (578457612).

Almost surely, 2^2121011233 is an apocalyptic number.

It is an amenable number.

2121011233 is a deficient number, since it is larger than the sum of its proper divisors (192819215).

2121011233 is a wasteful number, since it uses less digits than its factorization.

2121011233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192819214.

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

The square root of 2121011233 is about 46054.4377123421. The cubic root of 2121011233 is about 1284.8358802644.

Adding to 2121011233 its reverse (3321101212), we get a palindrome (5442112445).

The spelling of 2121011233 in words is "two billion, one hundred twenty-one million, eleven thousand, two hundred thirty-three".