2133203121 has 20 divisors (see below), whose sum is σ = 3641871552. Its totient is φ = 1218972888.

The previous prime is 2133203119. The next prime is 2133203167. The reversal of 2133203121 is 1213023312.

2133203121 is a `hidden beast` number, since 21 + 332 + 0 + 312 + 1 = 666.

2133203121 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2133203121 - 2¹ = 2133203119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2133203094 and 2133203103.

It is not an unprimeable number, because it can be changed into a prime (2133203021) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1880565 + ... + 1881698.

Almost surely, 2^2133203121 is an apocalyptic number.

2133203121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2133203121 is a deficient number, since it is larger than the sum of its proper divisors (1508668431).

2133203121 is an equidigital number, since it uses as much as digits as its factorization.

2133203121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3762282 (or 3762273 counting only the distinct ones).

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

The square root of 2133203121 is about 46186.6119238032. The cubic root of 2133203121 is about 1287.2929875609.

Adding to 2133203121 its reverse (1213023312), we get a palindrome (3346226433).

The spelling of 2133203121 in words is "two billion, one hundred thirty-three million, two hundred three thousand, one hundred twenty-one".