111221013 has 8 divisors (see below), whose sum is σ = 149277376. Its totient is φ = 73656000.

The previous prime is 111220999. The next prime is 111221023. The reversal of 111221013 is 310122111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 111221013 - 2⁸ = 111220757 is a prime.

It is a super-4 number, since 4×111221013⁴ (a number of 33 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 111221013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111221023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122308 + ... + 123213.

It is an arithmetic number, because the mean of its divisors is an integer number (18659672).

Almost surely, 2^111221013 is an apocalyptic number.

It is an amenable number.

111221013 is a deficient number, since it is larger than the sum of its proper divisors (38056363).

111221013 is a wasteful number, since it uses less digits than its factorization.

111221013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245675.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 111221013 is about 10546.1373497599. The cubic root of 111221013 is about 480.9083104896.

Adding to 111221013 its reverse (310122111), we get a palindrome (421343124).

The spelling of 111221013 in words is "one hundred eleven million, two hundred twenty-one thousand, thirteen".