111231222000 has 160 divisors (see below), whose sum is σ = 358777036800. Its totient is φ = 29647801600.

The previous prime is 111231221987. The next prime is 111231222019. The reversal of 111231222000 is 222132111.

It is a super-2 number, since 2×111231222000² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23175601 + ... + 23180399.

It is an arithmetic number, because the mean of its divisors is an integer number (2242356480).

Almost surely, 2^111231222000 is an apocalyptic number.

111231222000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111231222000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179388518400).

111231222000 is an abundant number, since it is smaller than the sum of its proper divisors (247545814800).

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

111231222000 is a wasteful number, since it uses less digits than its factorization.

111231222000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8688 (or 8672 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 111231222000 its reverse (222132111), we get a palindrome (111453354111).

The spelling of 111231222000 in words is "one hundred eleven billion, two hundred thirty-one million, two hundred twenty-two thousand".