111000121111001 has 4 divisors (see below), whose sum is σ = 111026939216400. Its totient is φ = 110973303005604.

The previous prime is 111000121110971. The next prime is 111000121111003. The reversal of 111000121111001 is 100111121000111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 111000121111001 - 2²² = 111000116916697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111000121111003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13409046491 + ... + 13409054768.

It is an arithmetic number, because the mean of its divisors is an integer number (27756734804100).

Almost surely, 2^{111000121111001} is an apocalyptic number.

It is an amenable number.

111000121111001 is a deficient number, since it is larger than the sum of its proper divisors (26818105399).

111000121111001 is an equidigital number, since it uses as much as digits as its factorization.

111000121111001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26818105398.

The product of its (nonzero) digits is 2, while the sum is 11.

Adding to 111000121111001 its reverse (100111121000111), we get a palindrome (211111242111112).

The spelling of 111000121111001 in words is "one hundred eleven trillion, one hundred twenty-one million, one hundred eleven thousand, one".