111100211111121 has 8 divisors (see below), whose sum is σ = 148885562098944. Its totient is φ = 73690833765360.

The previous prime is 111100211111111. The next prime is 111100211111147. The reversal of 111100211111121 is 121111112001111.

It is a happy number.

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

It is not a de Polignac number, because 111100211111121 - 2⁵ = 111100211111089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111100211111121.

It is not an unprimeable number, because it can be changed into a prime (111100211111111) 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, 93993409825 + ... + 93993411006.

It is an arithmetic number, because the mean of its divisors is an integer number (18610695262368).

Almost surely, 2^{111100211111121} is an apocalyptic number.

It is an amenable number.

111100211111121 is a deficient number, since it is larger than the sum of its proper divisors (37785350987823).

111100211111121 is a wasteful number, since it uses less digits than its factorization.

111100211111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187986821031.

The product of its (nonzero) digits is 4, while the sum is 15.

Adding to 111100211111121 its reverse (121111112001111), we get a palindrome (232211323112232).

The spelling of 111100211111121 in words is "one hundred eleven trillion, one hundred billion, two hundred eleven million, one hundred eleven thousand, one hundred twenty-one".