2120212321 has 2 divisors, whose sum is σ = 2120212322. Its totient is φ = 2120212320.

The previous prime is 2120212313. The next prime is 2120212331. The reversal of 2120212321 is 1232120212.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1854163600 + 266048721 = 43060^2 + 16311^2 .

It is a cyclic number.

It is not a de Polignac number, because 2120212321 - 2³ = 2120212313 is a prime.

It is a super-2 number, since 2×2120212321² = 8990600572240414082, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2120212295 and 2120212304.

It is not a weakly prime, because it can be changed into another prime (2120212331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060106160 + 1060106161.

It is an arithmetic number, because the mean of its divisors is an integer number (1060106161).

Almost surely, 2^2120212321 is an apocalyptic number.

It is an amenable number.

2120212321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120212321 is an equidigital number, since it uses as much as digits as its factorization.

2120212321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 2120212321 is about 46045.7633338834. The cubic root of 2120212321 is about 1284.6745421737.

Adding to 2120212321 its reverse (1232120212), we get a palindrome (3352332533).

The spelling of 2120212321 in words is "two billion, one hundred twenty million, two hundred twelve thousand, three hundred twenty-one".