111222102121200 has 1200 divisors, whose sum is σ = 464507074748640. Its totient is φ = 25274226216960.

The previous prime is 111222102121121. The next prime is 111222102121211. The reversal of 111222102121200 is 2121201222111.

111222102121200 is a `hidden beast` number, since 1 + 1 + 122 + 210 + 212 + 120 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1200).

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 239 ways as a sum of consecutive naturals, for example, 4486016004 + ... + 4486040796.

Almost surely, 2^{111222102121200} is an apocalyptic number.

111222102121200 is a gapful number since it is divisible by the number (10) 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 111222102121200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (232253537374320).

111222102121200 is an abundant number, since it is smaller than the sum of its proper divisors (353284972627440).

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

111222102121200 is a wasteful number, since it uses less digits than its factorization.

111222102121200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25021 (or 24983 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 111222102121200 its reverse (2121201222111), we get a palindrome (113343303343311).

The spelling of 111222102121200 in words is "one hundred eleven trillion, two hundred twenty-two billion, one hundred two million, one hundred twenty-one thousand, two hundred".