111212102122 has 48 divisors (see below), whose sum is σ = 185577670656. Its totient is φ = 49942332000.

The previous prime is 111212102119. The next prime is 111212102129. The reversal of 111212102122 is 221201212111.

It is a junction number, because it is equal to n+sod(n) for n = 111212102096 and 111212102105.

It is not an unprimeable number, because it can be changed into a prime (111212102129) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11898583 + ... + 11907925.

It is an arithmetic number, because the mean of its divisors is an integer number (3866201472).

Almost surely, 2^111212102122 is an apocalyptic number.

111212102122 is a deficient number, since it is larger than the sum of its proper divisors (74365568534).

111212102122 is a wasteful number, since it uses less digits than its factorization.

111212102122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9955 (or 9944 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 111212102122 its reverse (221201212111), we get a palindrome (332413314233).

The spelling of 111212102122 in words is "one hundred eleven billion, two hundred twelve million, one hundred two thousand, one hundred twenty-two".