2012100323221 has 2 divisors, whose sum is σ = 2012100323222. Its totient is φ = 2012100323220.

The previous prime is 2012100323183. The next prime is 2012100323267. The reversal of 2012100323221 is 1223230012102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1406154842596 + 605945480625 = 1185814^2 + 778425^2 .

It is a cyclic number.

It is not a de Polignac number, because 2012100323221 - 2⁹ = 2012100322709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2012100323021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1006050161610 + 1006050161611.

It is an arithmetic number, because the mean of its divisors is an integer number (1006050161611).

Almost surely, 2^{2012100323221} is an apocalyptic number.

It is an amenable number.

2012100323221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2012100323221 is an equidigital number, since it uses as much as digits as its factorization.

2012100323221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 2012100323221 its reverse (1223230012102), we get a palindrome (3235330335323).

The spelling of 2012100323221 in words is "two trillion, twelve billion, one hundred million, three hundred twenty-three thousand, two hundred twenty-one".