2012120010221 has 2 divisors, whose sum is σ = 2012120010222. Its totient is φ = 2012120010220.

The previous prime is 2012120010191. The next prime is 2012120010223. The reversal of 2012120010221 is 1220100212102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1150768962121 + 861351048100 = 1072739^2 + 928090^2 .

It is a cyclic number.

It is not a de Polignac number, because 2012120010221 - 2³⁰ = 2011046268397 is a prime.

It is a Sophie Germain prime.

Together with 2012120010223, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2012120010196 and 2012120010205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2012120010223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1006060005110 + 1006060005111.

It is an arithmetic number, because the mean of its divisors is an integer number (1006060005111).

Almost surely, 2^{2012120010221} is an apocalyptic number.

It is an amenable number.

2012120010221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2012120010221 is an equidigital number, since it uses as much as digits as its factorization.

2012120010221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2012120010221 its reverse (1220100212102), we get a palindrome (3232220222323).

The spelling of 2012120010221 in words is "two trillion, twelve billion, one hundred twenty million, ten thousand, two hundred twenty-one".