2120322021 has 16 divisors (see below), whose sum is σ = 2840620224. Its totient is φ = 1406801664.

The previous prime is 2120322007. The next prime is 2120322047. The reversal of 2120322021 is 1202230212.

It is a happy number.

It is not a de Polignac number, because 2120322021 - 2⁷ = 2120321893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120322121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 747021 + ... + 749853.

It is an arithmetic number, because the mean of its divisors is an integer number (177538764).

Almost surely, 2^2120322021 is an apocalyptic number.

It is an amenable number.

2120322021 is a deficient number, since it is larger than the sum of its proper divisors (720298203).

2120322021 is a wasteful number, since it uses less digits than its factorization.

2120322021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3940.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 2120322021 is about 46046.9545247023. The cubic root of 2120322021 is about 1284.6966981885.

Adding to 2120322021 its reverse (1202230212), we get a palindrome (3322552233).

The spelling of 2120322021 in words is "two billion, one hundred twenty million, three hundred twenty-two thousand, twenty-one".