121200210200 has 48 divisors (see below), whose sum is σ = 290880519360. Its totient is φ = 46916208000.

The previous prime is 121200210161. The next prime is 121200210203. The reversal of 121200210200 is 2012002121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121200210203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9768011 + ... + 9780410.

It is an arithmetic number, because the mean of its divisors is an integer number (6060010820).

Almost surely, 2^121200210200 is an apocalyptic number.

121200210200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121200210200 is an abundant number, since it is smaller than the sum of its proper divisors (169680309160).

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

121200210200 is a wasteful number, since it uses less digits than its factorization.

121200210200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19548468 (or 19548459 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 121200210200 its reverse (2012002121), we get a palindrome (123212212321).

The spelling of 121200210200 in words is "one hundred twenty-one billion, two hundred million, two hundred ten thousand, two hundred".