2121430033 has 4 divisors (see below), whose sum is σ = 2129316660. Its totient is φ = 2113543408.

The previous prime is 2121429943. The next prime is 2121430097. The reversal of 2121430033 is 3300341212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 262699264 + 1858730769 = 16208^2 + 43113^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121430033 - 2¹⁷ = 2121298961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121430933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3942910 + ... + 3943447.

It is an arithmetic number, because the mean of its divisors is an integer number (532329165).

Almost surely, 2^2121430033 is an apocalyptic number.

It is an amenable number.

2121430033 is a deficient number, since it is larger than the sum of its proper divisors (7886627).

2121430033 is an equidigital number, since it uses as much as digits as its factorization.

2121430033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7886626.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 2121430033 is about 46058.9842810282. The cubic root of 2121430033 is about 1284.9204395926.

Adding to 2121430033 its reverse (3300341212), we get a palindrome (5421771245).

The spelling of 2121430033 in words is "two billion, one hundred twenty-one million, four hundred thirty thousand, thirty-three".