111121002121200 has 240 divisors, whose sum is σ = 365592914576736. Its totient is φ = 28830225715200.

The previous prime is 111121002121187. The next prime is 111121002121223. The reversal of 111121002121200 is 2121200121111.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (240).

It is a super-2 number, since 2×111121002121200² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 111121002121200.

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, 1872806734 + ... + 1872866066.

Almost surely, 2^{111121002121200} is an apocalyptic number.

111121002121200 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 111121002121200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (182796457288368).

111121002121200 is an abundant number, since it is smaller than the sum of its proper divisors (254471912455536).

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

111121002121200 is a wasteful number, since it uses less digits than its factorization.

111121002121200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101572 (or 101561 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 111121002121200 its reverse (2121200121111), we get a palindrome (113242202242311).

The spelling of 111121002121200 in words is "one hundred eleven trillion, one hundred twenty-one billion, two million, one hundred twenty-one thousand, two hundred".