111111110121102 has 64 divisors (see below), whose sum is σ = 280896278444544. Its totient is φ = 28512028252800.

The previous prime is 111111110121091. The next prime is 111111110121199. The reversal of 111111110121102 is 201121011111111.

It is a happy number.

111111110121102 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×111111110121102² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2749982524 + ... + 2750022927.

It is an arithmetic number, because the mean of its divisors is an integer number (4389004350696).

Almost surely, 2^{111111110121102} is an apocalyptic number.

111111110121102 is an abundant number, since it is smaller than the sum of its proper divisors (169785168323442).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111111110121102 is a wasteful number, since it uses less digits than its factorization.

111111110121102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5500005513.

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

Adding to 111111110121102 its reverse (201121011111111), we get a palindrome (312232121232213).

Subtracting 111111110121102 from its reverse (201121011111111), we obtain a palindrome (90009900990009).

The spelling of 111111110121102 in words is "one hundred eleven trillion, one hundred eleven billion, one hundred ten million, one hundred twenty-one thousand, one hundred two".