111013021221 has 16 divisors (see below), whose sum is σ = 150316241280. Its totient is φ = 72867916800.

The previous prime is 111013021211. The next prime is 111013021247. The reversal of 111013021221 is 122120310111.

It is not a de Polignac number, because 111013021221 - 2¹⁵ = 111012988453 is a prime.

It is a super-2 number, since 2×111013021221² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 111013021221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111013021211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1033156 + ... + 1135533.

It is an arithmetic number, because the mean of its divisors is an integer number (9394765080).

Almost surely, 2^111013021221 is an apocalyptic number.

It is an amenable number.

111013021221 is a deficient number, since it is larger than the sum of its proper divisors (39303220059).

111013021221 is a wasteful number, since it uses less digits than its factorization.

111013021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2168956.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 111013021221 its reverse (122120310111), we get a palindrome (233133331332).

The spelling of 111013021221 in words is "one hundred eleven billion, thirteen million, twenty-one thousand, two hundred twenty-one".