111109901221 has 8 divisors (see below), whose sum is σ = 121216618944. Its totient is φ = 101004153120.

The previous prime is 111109901153. The next prime is 111109901239. The reversal of 111109901221 is 122109901111.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 111109901221 - 2¹⁹ = 111109376933 is a prime.

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 111109901221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111109901261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8496 + ... + 471478.

It is an arithmetic number, because the mean of its divisors is an integer number (15152077368).

Almost surely, 2^111109901221 is an apocalyptic number.

111109901221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111109901221 is a deficient number, since it is larger than the sum of its proper divisors (10106717723).

111109901221 is a wasteful number, since it uses less digits than its factorization.

111109901221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484811.

The product of its (nonzero) digits is 324, while the sum is 28.

The spelling of 111109901221 in words is "one hundred eleven billion, one hundred nine million, nine hundred one thousand, two hundred twenty-one".