121100011200 has 1008 divisors, whose sum is σ = 540735926400. Its totient is φ = 26214451200.

The previous prime is 121100011189. The next prime is 121100011213. The reversal of 121100011200 is 2110001121.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (1008).

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

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 40217695 + ... + 40220705.

Almost surely, 2^121100011200 is an apocalyptic number.

121100011200 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 121100011200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (270367963200).

121100011200 is an abundant number, since it is smaller than the sum of its proper divisors (419635915200).

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

121100011200 is a wasteful number, since it uses less digits than its factorization.

121100011200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3075 (or 3047 counting only the distinct ones).

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

Adding to 121100011200 its reverse (2110001121), we get a palindrome (123210012321).

The spelling of 121100011200 in words is "one hundred twenty-one billion, one hundred million, eleven thousand, two hundred".