111212232030 has 96 divisors (see below), whose sum is σ = 308037824640. Its totient is φ = 27757183680.

The previous prime is 111212232023. The next prime is 111212232073. The reversal of 111212232030 is 30232212111.

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

It is a junction number, because it is equal to n+sod(n) for n = 111212231994 and 111212232012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 249856 + ... + 533715.

It is an arithmetic number, because the mean of its divisors is an integer number (3208727340).

Almost surely, 2^111212232030 is an apocalyptic number.

111212232030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111212232030 is an abundant number, since it is smaller than the sum of its proper divisors (196825592610).

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

111212232030 is a wasteful number, since it uses less digits than its factorization.

111212232030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 783686 (or 783683 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 111212232030 its reverse (30232212111), we get a palindrome (141444444141).

The spelling of 111212232030 in words is "one hundred eleven billion, two hundred twelve million, two hundred thirty-two thousand, thirty".