121110012200 has 24 divisors (see below), whose sum is σ = 281580778830. Its totient is φ = 48444004800.

The previous prime is 121110012187. The next prime is 121110012203. The reversal of 121110012200 is 2210011121.

It can be written as a sum of positive squares in 3 ways, for example, as 70491312004 + 50618700196 = 265502^2 + 224986^2 .

It is not an unprimeable number, because it can be changed into a prime (121110012203) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 302774831 + ... + 302775230.

Almost surely, 2^121110012200 is an apocalyptic number.

121110012200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121110012200 is an abundant number, since it is smaller than the sum of its proper divisors (160470766630).

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

121110012200 is a wasteful number, since it uses less digits than its factorization.

121110012200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605550077 (or 605550068 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 121110012200 its reverse (2210011121), we get a palindrome (123320023321).

The spelling of 121110012200 in words is "one hundred twenty-one billion, one hundred ten million, twelve thousand, two hundred".