111302221212 has 144 divisors (see below), whose sum is σ = 358214351040. Its totient is φ = 28342185984.

The previous prime is 111302221189. The next prime is 111302221231. The reversal of 111302221212 is 212122203111.

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, 490773 + ... + 680780.

It is an arithmetic number, because the mean of its divisors is an integer number (2487599660).

Almost surely, 2^111302221212 is an apocalyptic number.

111302221212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

111302221212 is an abundant number, since it is smaller than the sum of its proper divisors (246912129828).

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

111302221212 is a wasteful number, since it uses less digits than its factorization.

111302221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1171612 (or 1171607 counting only the distinct ones).

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

Adding to 111302221212 its reverse (212122203111), we get a palindrome (323424424323).

The spelling of 111302221212 in words is "one hundred eleven billion, three hundred two million, two hundred twenty-one thousand, two hundred twelve".