111111201200221 has 32 divisors (see below), whose sum is σ = 115505662003200. Its totient is φ = 106816699418880.

The previous prime is 111111201200203. The next prime is 111111201200227. The reversal of 111111201200221 is 122002102111111.

It is a cyclic number.

It is not a de Polignac number, because 111111201200221 - 2¹⁹ = 111111200675933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111111201200195 and 111111201200204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111111201200227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4860708690 + ... + 4860731548.

It is an arithmetic number, because the mean of its divisors is an integer number (3609551937600).

Almost surely, 2^{111111201200221} is an apocalyptic number.

It is an amenable number.

111111201200221 is a deficient number, since it is larger than the sum of its proper divisors (4394460802979).

111111201200221 is a wasteful number, since it uses less digits than its factorization.

111111201200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30129.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 111111201200221 its reverse (122002102111111), we get a palindrome (233113303311332).

The spelling of 111111201200221 in words is "one hundred eleven trillion, one hundred eleven billion, two hundred one million, two hundred thousand, two hundred twenty-one".