2120132621 has 2 divisors, whose sum is σ = 2120132622. Its totient is φ = 2120132620.

The previous prime is 2120132603. The next prime is 2120132627. The reversal of 2120132621 is 1262310212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1802936521 + 317196100 = 42461^2 + 17810^2 .

It is a cyclic number.

It is not a de Polignac number, because 2120132621 - 2¹⁰ = 2120131597 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2120132593 and 2120132602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2120132627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060066310 + 1060066311.

It is an arithmetic number, because the mean of its divisors is an integer number (1060066311).

Almost surely, 2^2120132621 is an apocalyptic number.

It is an amenable number.

2120132621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120132621 is an equidigital number, since it uses as much as digits as its factorization.

2120132621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 2120132621 is about 46044.8978823930. The cubic root of 2120132621 is about 1284.6584447538.

Adding to 2120132621 its reverse (1262310212), we get a palindrome (3382442833).

The spelling of 2120132621 in words is "two billion, one hundred twenty million, one hundred thirty-two thousand, six hundred twenty-one".