121100110200 has 72 divisors (see below), whose sum is σ = 406694542800. Its totient is φ = 32293362240.

The previous prime is 121100110199. The next prime is 121100110211. The reversal of 121100110200 is 2011001121.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (72).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 33637120 + ... + 33640719.

Almost surely, 2^121100110200 is an apocalyptic number.

121100110200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121100110200 is an abundant number, since it is smaller than the sum of its proper divisors (285594432600).

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

121100110200 is a wasteful number, since it uses less digits than its factorization.

121100110200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67277861 (or 67277849 counting only the distinct ones).

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

Adding to 121100110200 its reverse (2011001121), we get a palindrome (123111111321).

The spelling of 121100110200 in words is "one hundred twenty-one billion, one hundred million, one hundred ten thousand, two hundred".