111221022221001 has 24 divisors (see below), whose sum is σ = 200294135256384. Its totient is φ = 57777154400160.

The previous prime is 111221022220949. The next prime is 111221022221063. The reversal of 111221022221001 is 100122220122111.

111221022221001 is a `hidden beast` number, since 1 + 11 + 221 + 0 + 222 + 210 + 0 + 1 = 666.

It is not a de Polignac number, because 111221022221001 - 2⁶ = 111221022220937 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (111221022221401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 80246047086 + ... + 80246048471.

It is an arithmetic number, because the mean of its divisors is an integer number (8345588969016).

Almost surely, 2^{111221022221001} is an apocalyptic number.

111221022221001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111221022221001 is a deficient number, since it is larger than the sum of its proper divisors (89073113035383).

111221022221001 is a wasteful number, since it uses less digits than its factorization.

111221022221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160492095581 (or 160492095578 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 111221022221001 its reverse (100122220122111), we get a palindrome (211343242343112).

The spelling of 111221022221001 in words is "one hundred eleven trillion, two hundred twenty-one billion, twenty-two million, two hundred twenty-one thousand, one".