111212220310312 has 128 divisors (see below), whose sum is σ = 238074403230720. Its totient is φ = 48242055168000.

The previous prime is 111212220310231. The next prime is 111212220310339. The reversal of 111212220310312 is 213013022212111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1266711088 + ... + 1266798880.

It is an arithmetic number, because the mean of its divisors is an integer number (1859956275240).

Almost surely, 2^{111212220310312} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111212220310312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119037201615360).

111212220310312 is an abundant number, since it is smaller than the sum of its proper divisors (126862182920408).

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

111212220310312 is a wasteful number, since it uses less digits than its factorization.

111212220310312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94275 (or 94271 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 111212220310312 its reverse (213013022212111), we get a palindrome (324225242522423).

The spelling of 111212220310312 in words is "one hundred eleven trillion, two hundred twelve billion, two hundred twenty million, three hundred ten thousand, three hundred twelve".