122210021111221 has 2 divisors, whose sum is σ = 122210021111222. Its totient is φ = 122210021111220.

The previous prime is 122210021111183. The next prime is 122210021111231. The reversal of 122210021111221 is 122111120012221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99498410562321 + 22711610548900 = 9974889^2 + 4765670^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122210021111221 is a prime.

It is a super-2 number, since 2×122210021111221² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122210021111231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61105010555610 + 61105010555611.

It is an arithmetic number, because the mean of its divisors is an integer number (61105010555611).

Almost surely, 2^{122210021111221} is an apocalyptic number.

It is an amenable number.

122210021111221 is a deficient number, since it is larger than the sum of its proper divisors (1).

122210021111221 is an equidigital number, since it uses as much as digits as its factorization.

122210021111221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 122210021111221 its reverse (122111120012221), we get a palindrome (244321141123442).

The spelling of 122210021111221 in words is "one hundred twenty-two trillion, two hundred ten billion, twenty-one million, one hundred eleven thousand, two hundred twenty-one".