111121200211212 has 144 divisors (see below), whose sum is σ = 284926834483200. Its totient is φ = 36509663548800.

The previous prime is 111121200211207. The next prime is 111121200211289. The reversal of 111121200211212 is 212112002121111.

It is a happy number.

111121200211212 is a `hidden beast` number, since 11 + 11 + 21 + 200 + 211 + 212 = 666.

It is a super-2 number, since 2×111121200211212² (a number of 29 digits) contains 22 as substring.

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

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, 5266147462 + ... + 5266168562.

It is an arithmetic number, because the mean of its divisors is an integer number (1978658572800).

Almost surely, 2^{111121200211212} is an apocalyptic number.

111121200211212 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 111121200211212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142463417241600).

111121200211212 is an abundant number, since it is smaller than the sum of its proper divisors (173805634271988).

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

111121200211212 is a wasteful number, since it uses less digits than its factorization.

111121200211212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24236 (or 24231 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 111121200211212 its reverse (212112002121111), we get a palindrome (323233202332323).

The spelling of 111121200211212 in words is "one hundred eleven trillion, one hundred twenty-one billion, two hundred million, two hundred eleven thousand, two hundred twelve".