111222121230 has 96 divisors (see below), whose sum is σ = 315724881888. Its totient is φ = 26940844800.

The previous prime is 111222121201. The next prime is 111222121273. The reversal of 111222121230 is 32121222111.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1179220 + ... + 1270040.

It is an arithmetic number, because the mean of its divisors is an integer number (3288800853).

Almost surely, 2^111222121230 is an apocalyptic number.

111222121230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 111222121230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157862440944).

111222121230 is an abundant number, since it is smaller than the sum of its proper divisors (204502760658).

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

111222121230 is a wasteful number, since it uses less digits than its factorization.

111222121230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92082 (or 92079 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 111222121230 its reverse (32121222111), we get a palindrome (143343343341).

The spelling of 111222121230 in words is "one hundred eleven billion, two hundred twenty-two million, one hundred twenty-one thousand, two hundred thirty".