2012102221 has 2 divisors, whose sum is σ = 2012102222. Its totient is φ = 2012102220.

The previous prime is 2012102203. The next prime is 2012102243. The reversal of 2012102221 is 1222012102.

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., 2011074025 + 1028196 = 44845^2 + 1014^2 .

It is a cyclic number.

It is not a de Polignac number, because 2012102221 - 2⁵ = 2012102189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2012108221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1006051110 + 1006051111.

It is an arithmetic number, because the mean of its divisors is an integer number (1006051111).

Almost surely, 2^2012102221 is an apocalyptic number.

It is an amenable number.

2012102221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2012102221 is an equidigital number, since it uses as much as digits as its factorization.

2012102221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 2012102221 is about 44856.4624218183. The cubic root of 2012102221 is about 1262.4572483122.

Adding to 2012102221 its reverse (1222012102), we get a palindrome (3234114323).

The spelling of 2012102221 in words is "two billion, twelve million, one hundred two thousand, two hundred twenty-one".