2123322021 has 6 divisors (see below), whose sum is σ = 3067020710. Its totient is φ = 1415548008.

The previous prime is 2123322013. The next prime is 2123322023. The reversal of 2123322021 is 1202233212.

It can be written as a sum of positive squares in only one way, i.e., 1885730625 + 237591396 = 43425^2 + 15414^2 .

It is not a de Polignac number, because 2123322021 - 2³ = 2123322013 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2123321985 and 2123322003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123322023) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 117962326 + ... + 117962343.

Almost surely, 2^2123322021 is an apocalyptic number.

It is an amenable number.

2123322021 is a deficient number, since it is larger than the sum of its proper divisors (943698689).

2123322021 is a wasteful number, since it uses less digits than its factorization.

2123322021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235924675 (or 235924672 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 2123322021 is about 46079.5184545151. The cubic root of 2123322021 is about 1285.3023096307.

Adding to 2123322021 its reverse (1202233212), we get a palindrome (3325555233).

It can be divided in two parts, 212 and 3322021, that added together give a palindrome (3322233).

The spelling of 2123322021 in words is "two billion, one hundred twenty-three million, three hundred twenty-two thousand, twenty-one".