111221013221 has 16 divisors (see below), whose sum is σ = 118088409600. Its totient is φ = 104524902768.

The previous prime is 111221013191. The next prime is 111221013227. The reversal of 111221013221 is 122310122111.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 111221013221 - 2⁶ = 111221013157 is a prime.

It is a super-2 number, since 2×111221013221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111221013221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111221013227) 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, 2566310 + ... + 2609288.

It is an arithmetic number, because the mean of its divisors is an integer number (7380525600).

Almost surely, 2^111221013221 is an apocalyptic number.

It is an amenable number.

111221013221 is a deficient number, since it is larger than the sum of its proper divisors (6867396379).

111221013221 is a wasteful number, since it uses less digits than its factorization.

111221013221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44968.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 111221013221 its reverse (122310122111), we get a palindrome (233531135332).

The spelling of 111221013221 in words is "one hundred eleven billion, two hundred twenty-one million, thirteen thousand, two hundred twenty-one".