2021120033 has 4 divisors (see below), whose sum is σ = 2041956420. Its totient is φ = 2000283648.

The previous prime is 2021119999. The next prime is 2021120047. The reversal of 2021120033 is 3300211202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3300211202 = 2 ⋅1650105601.

It can be written as a sum of positive squares in 2 ways, for example, as 537868864 + 1483251169 = 23192^2 + 38513^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021120033 - 2²⁰ = 2020071457 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2021120053) 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, 10418048 + ... + 10418241.

It is an arithmetic number, because the mean of its divisors is an integer number (510489105).

Almost surely, 2^2021120033 is an apocalyptic number.

It is an amenable number.

2021120033 is a deficient number, since it is larger than the sum of its proper divisors (20836387).

2021120033 is an equidigital number, since it uses as much as digits as its factorization.

2021120033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20836386.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 2021120033 is about 44956.8685853452. The cubic root of 2021120033 is about 1264.3404588902.

Adding to 2021120033 its reverse (3300211202), we get a palindrome (5321331235).

The spelling of 2021120033 in words is "two billion, twenty-one million, one hundred twenty thousand, thirty-three".