2012102120221 has 2 divisors, whose sum is σ = 2012102120222. Its totient is φ = 2012102120220.

The previous prime is 2012102120201. The next prime is 2012102120227. The reversal of 2012102120221 is 1220212012102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1929223771225 + 82878348996 = 1388965^2 + 287886^2 .

It is a cyclic number.

It is not a de Polignac number, because 2012102120221 - 2¹⁵ = 2012102087453 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2012102120195 and 2012102120204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2012102120227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1006051060110 + 1006051060111.

It is an arithmetic number, because the mean of its divisors is an integer number (1006051060111).

Almost surely, 2^{2012102120221} is an apocalyptic number.

It is an amenable number.

2012102120221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2012102120221 is an equidigital number, since it uses as much as digits as its factorization.

2012102120221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2012102120221 its reverse (1220212012102), we get a palindrome (3232314132323).

The spelling of 2012102120221 in words is "two trillion, twelve billion, one hundred two million, one hundred twenty thousand, two hundred twenty-one".