122211101115221 has 2 divisors, whose sum is σ = 122211101115222. Its totient is φ = 122211101115220.

The previous prime is 122211101115209. The next prime is 122211101115331. The reversal of 122211101115221 is 122511101112221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93221168422321 + 28989932692900 = 9655111^2 + 5384230^2 .

It is an emirp because it is prime and its reverse (122511101112221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 122211101115221 - 2¹⁰ = 122211101114197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122211101115421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61105550557610 + 61105550557611.

It is an arithmetic number, because the mean of its divisors is an integer number (61105550557611).

Almost surely, 2^{122211101115221} is an apocalyptic number.

It is an amenable number.

122211101115221 is a deficient number, since it is larger than the sum of its proper divisors (1).

122211101115221 is an equidigital number, since it uses as much as digits as its factorization.

122211101115221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 160, while the sum is 23.

Adding to 122211101115221 its reverse (122511101112221), we get a palindrome (244722202227442).

The spelling of 122211101115221 in words is "one hundred twenty-two trillion, two hundred eleven billion, one hundred one million, one hundred fifteen thousand, two hundred twenty-one".