122221202001221 has 2 divisors, whose sum is σ = 122221202001222. Its totient is φ = 122221202001220.

The previous prime is 122221202001187. The next prime is 122221202001247. The reversal of 122221202001221 is 122100202122221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122221006840321 + 195160900 = 11055361^2 + 13970^2 .

It is a cyclic number.

It is not a de Polignac number, because 122221202001221 - 2²⁶ = 122221134892357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 122221202001193 and 122221202001202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122221202001281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61110601000610 + 61110601000611.

It is an arithmetic number, because the mean of its divisors is an integer number (61110601000611).

Almost surely, 2^{122221202001221} is an apocalyptic number.

It is an amenable number.

122221202001221 is a deficient number, since it is larger than the sum of its proper divisors (1).

122221202001221 is an equidigital number, since it uses as much as digits as its factorization.

122221202001221 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 20.

Adding to 122221202001221 its reverse (122100202122221), we get a palindrome (244321404123442).

The spelling of 122221202001221 in words is "one hundred twenty-two trillion, two hundred twenty-one billion, two hundred two million, one thousand, two hundred twenty-one".