2120233021 has 2 divisors, whose sum is σ = 2120233022. Its totient is φ = 2120233020.

The previous prime is 2120233019. The next prime is 2120233051. The reversal of 2120233021 is 1203320212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1183016025 + 937216996 = 34395^2 + 30614^2 .

It is a cyclic number.

It is not a de Polignac number, because 2120233021 - 2¹ = 2120233019 is a prime.

Together with 2120233019, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 2120232986 and 2120233004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2120233001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060116510 + 1060116511.

It is an arithmetic number, because the mean of its divisors is an integer number (1060116511).

Almost surely, 2^2120233021 is an apocalyptic number.

It is an amenable number.

2120233021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120233021 is an equidigital number, since it uses as much as digits as its factorization.

2120233021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 2120233021 is about 46045.9881097148. The cubic root of 2120233021 is about 1284.6787229934.

Adding to 2120233021 its reverse (1203320212), we get a palindrome (3323553233).

The spelling of 2120233021 in words is "two billion, one hundred twenty million, two hundred thirty-three thousand, twenty-one".