111001212 has 192 divisors, whose sum is σ = 349977600. Its totient is φ = 29756160.

The previous prime is 111001201. The next prime is 111001213. The reversal of 111001212 is 212100111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 111001194 and 111001203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111001213) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1337323 + ... + 1337405.

It is an arithmetic number, because the mean of its divisors is an integer number (1822800).

Almost surely, 2^111001212 is an apocalyptic number.

111001212 is a gapful number since it is divisible by the number (12) 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 111001212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174988800).

111001212 is an abundant number, since it is smaller than the sum of its proper divisors (238976388).

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

111001212 is a wasteful number, since it uses less digits than its factorization.

111001212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193 (or 185 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 111001212 is about 10535.7112716703. The cubic root of 111001212 is about 480.5913025370.

Adding to 111001212 its reverse (212100111), we get a palindrome (323101323).

The spelling of 111001212 in words is "one hundred eleven million, one thousand, two hundred twelve".