111100221022121 has 8 divisors (see below), whose sum is σ = 111251701027488. Its totient is φ = 110948776704000.

The previous prime is 111100221022111. The next prime is 111100221022123. The reversal of 111100221022121 is 121220122001111.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111100221022121 is a prime.

It is a super-2 number, since 2×111100221022121² (a number of 29 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 111100221022121.

It is not an unprimeable number, because it can be changed into a prime (111100221022123) 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, 2688275 + ... + 15146856.

It is an arithmetic number, because the mean of its divisors is an integer number (13906462628436).

Almost surely, 2^{111100221022121} is an apocalyptic number.

It is an amenable number.

111100221022121 is a deficient number, since it is larger than the sum of its proper divisors (151480005367).

111100221022121 is an equidigital number, since it uses as much as digits as its factorization.

111100221022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17843623.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 111100221022121 its reverse (121220122001111), we get a palindrome (232320343023232).

The spelling of 111100221022121 in words is "one hundred eleven trillion, one hundred billion, two hundred twenty-one million, twenty-two thousand, one hundred twenty-one".