111012120102 has 128 divisors (see below), whose sum is σ = 246739893120. Its totient is φ = 33089126400.

The previous prime is 111012120049. The next prime is 111012120103. The reversal of 111012120102 is 201021210111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111012120103) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 78787174 + ... + 78788582.

It is an arithmetic number, because the mean of its divisors is an integer number (1927655415).

Almost surely, 2^111012120102 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111012120102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123369946560).

111012120102 is an abundant number, since it is smaller than the sum of its proper divisors (135727773018).

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

111012120102 is a wasteful number, since it uses less digits than its factorization.

111012120102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1738.

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

Adding to 111012120102 its reverse (201021210111), we get a palindrome (312033330213).

Subtracting 111012120102 from its reverse (201021210111), we obtain a palindrome (90009090009).

The spelling of 111012120102 in words is "one hundred eleven billion, twelve million, one hundred twenty thousand, one hundred two".