2220012221221 has 2 divisors, whose sum is σ = 2220012221222. Its totient is φ = 2220012221220.

The previous prime is 2220012221191. The next prime is 2220012221237. The reversal of 2220012221221 is 1221222100222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1182904212996 + 1037108008225 = 1087614^2 + 1018385^2 .

It is a cyclic number.

It is not a de Polignac number, because 2220012221221 - 2⁹ = 2220012220709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2220012221261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110006110610 + 1110006110611.

It is an arithmetic number, because the mean of its divisors is an integer number (1110006110611).

Almost surely, 2^{2220012221221} is an apocalyptic number.

It is an amenable number.

2220012221221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2220012221221 is an equidigital number, since it uses as much as digits as its factorization.

2220012221221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 2220012221221 its reverse (1221222100222), we get a palindrome (3441234321443).

The spelling of 2220012221221 in words is "two trillion, two hundred twenty billion, twelve million, two hundred twenty-one thousand, two hundred twenty-one".