2121020333 has 4 divisors (see below), whose sum is σ = 2142886620. Its totient is φ = 2099154048.

The previous prime is 2121020281. The next prime is 2121020339. The reversal of 2121020333 is 3330201212.

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 1226890729 + 894129604 = 35027^2 + 29902^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121020333 - 2¹⁰ = 2121019309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121020339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10932998 + ... + 10933191.

It is an arithmetic number, because the mean of its divisors is an integer number (535721655).

Almost surely, 2^2121020333 is an apocalyptic number.

It is an amenable number.

2121020333 is a deficient number, since it is larger than the sum of its proper divisors (21866287).

2121020333 is an equidigital number, since it uses as much as digits as its factorization.

2121020333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21866286.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 2121020333 is about 46054.5365083615. The cubic root of 2121020333 is about 1284.8377177511.

Adding to 2121020333 its reverse (3330201212), we get a palindrome (5451221545).

The spelling of 2121020333 in words is "two billion, one hundred twenty-one million, twenty thousand, three hundred thirty-three".