111001012122 has 192 divisors, whose sum is σ = 306411009408. Its totient is φ = 26349120000.

The previous prime is 111001012099. The next prime is 111001012147. The reversal of 111001012122 is 221210100111.

It is a junction number, because it is equal to n+sod(n) for n = 111001012098 and 111001012107.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4233172 + ... + 4259312.

It is an arithmetic number, because the mean of its divisors is an integer number (1595890674).

Almost surely, 2^111001012122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111001012122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153205504704).

111001012122 is an abundant number, since it is smaller than the sum of its proper divisors (195409997286).

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

111001012122 is a wasteful number, since it uses less digits than its factorization.

111001012122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26285 (or 26278 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 111001012122 its reverse (221210100111), we get a palindrome (332211112233).

The spelling of 111001012122 in words is "one hundred eleven billion, one million, twelve thousand, one hundred twenty-two".