111221201 has 16 divisors (see below), whose sum is σ = 137149824. Its totient is φ = 87830784.

The previous prime is 111221197. The next prime is 111221207. The reversal of 111221201 is 102122111.

It is a cyclic number.

It is not a de Polignac number, because 111221201 - 2² = 111221197 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111221207) 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, 70841 + ... + 72393.

It is an arithmetic number, because the mean of its divisors is an integer number (8571864).

Almost surely, 2^111221201 is an apocalyptic number.

It is an amenable number.

111221201 is a deficient number, since it is larger than the sum of its proper divisors (25928623).

111221201 is a wasteful number, since it uses less digits than its factorization.

111221201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2360.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 111221201 is about 10546.1462629721. The cubic root of 111221201 is about 480.9085814537.

Adding to 111221201 its reverse (102122111), we get a palindrome (213343312).

The spelling of 111221201 in words is "one hundred eleven million, two hundred twenty-one thousand, two hundred one".