111221121022201 has 16 divisors (see below), whose sum is σ = 113699355177600. Its totient is φ = 108762728537088.

The previous prime is 111221121022183. The next prime is 111221121022241. The reversal of 111221121022201 is 102220121122111.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 111221121022201 - 2⁷ = 111221121022073 is a prime.

It is a super-2 number, since 2×111221121022201² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111221121022241) 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, 187441255 + ... + 188033683.

It is an arithmetic number, because the mean of its divisors is an integer number (7106209698600).

Almost surely, 2^{111221121022201} is an apocalyptic number.

It is an amenable number.

111221121022201 is a deficient number, since it is larger than the sum of its proper divisors (2478234155399).

111221121022201 is a wasteful number, since it uses less digits than its factorization.

111221121022201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609168.

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

Adding to 111221121022201 its reverse (102220121122111), we get a palindrome (213441242144312).

The spelling of 111221121022201 in words is "one hundred eleven trillion, two hundred twenty-one billion, one hundred twenty-one million, twenty-two thousand, two hundred one".