122111201111221 has 16 divisors (see below), whose sum is σ = 140015069585280. Its totient is φ = 104322275870400.

The previous prime is 122111201111201. The next prime is 122111201111297. The reversal of 122111201111221 is 122111102111221.

It is not a de Polignac number, because 122111201111221 - 2⁵ = 122111201111189 is a prime.

It is a super-2 number, since 2×122111201111221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122111201111201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12454146 + ... + 19983196.

It is an arithmetic number, because the mean of its divisors is an integer number (8750941849080).

Almost surely, 2^{122111201111221} is an apocalyptic number.

It is an amenable number.

122111201111221 is a deficient number, since it is larger than the sum of its proper divisors (17903868474059).

122111201111221 is an equidigital number, since it uses as much as digits as its factorization.

122111201111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7536684.

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 122111201111221 its reverse (122111102111221), we get a palindrome (244222303222442).

The spelling of 122111201111221 in words is "one hundred twenty-two trillion, one hundred eleven billion, two hundred one million, one hundred eleven thousand, two hundred twenty-one".