121231201200 has 60 divisors (see below), whose sum is σ = 388343951688. Its totient is φ = 32328320000.

The previous prime is 121231201183. The next prime is 121231201207. The reversal of 121231201200 is 2102132121.

It is a tau number, because it is divible by the number of its divisors (60).

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 121231201200.

It is not an unprimeable number, because it can be changed into a prime (121231201207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50511801 + ... + 50514200.

Almost surely, 2^121231201200 is an apocalyptic number.

121231201200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121231201200 is an abundant number, since it is smaller than the sum of its proper divisors (267112750488).

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

121231201200 is a wasteful number, since it uses less digits than its factorization.

121231201200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101026022 (or 101026011 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 121231201200 its reverse (2102132121), we get a palindrome (123333333321).

The spelling of 121231201200 in words is "one hundred twenty-one billion, two hundred thirty-one million, two hundred one thousand, two hundred".