111110121212121 has 32 divisors (see below), whose sum is σ = 166240669645440. Its totient is φ = 73338556104000.

The previous prime is 111110121212099. The next prime is 111110121212179. The reversal of 111110121212121 is 121212121011111.

It is not a de Polignac number, because 111110121212121 - 2⁷ = 111110121211993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111110121212094 and 111110121212103.

It is not an unprimeable number, because it can be changed into a prime (111110121212821) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 146582731 + ... + 147338783.

It is an arithmetic number, because the mean of its divisors is an integer number (5195020926420).

Almost surely, 2^{111110121212121} is an apocalyptic number.

It is an amenable number.

111110121212121 is a deficient number, since it is larger than the sum of its proper divisors (55130548433319).

111110121212121 is a wasteful number, since it uses less digits than its factorization.

111110121212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810054 (or 810048 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 18.

Adding to 111110121212121 its reverse (121212121011111), we get a palindrome (232322242223232).

The spelling of 111110121212121 in words is "one hundred eleven trillion, one hundred ten billion, one hundred twenty-one million, two hundred twelve thousand, one hundred twenty-one".