121121113200 has 120 divisors (see below), whose sum is σ = 398477696688. Its totient is φ = 31426007040.

The previous prime is 121121113199. The next prime is 121121113207. The reversal of 121121113200 is 2311121121.

It is a tau number, because it is divible by the number of its divisors (120).

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 121121113200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121121113207) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1319577 + ... + 1408376.

Almost surely, 2^121121113200 is an apocalyptic number.

121121113200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121121113200 is an abundant number, since it is smaller than the sum of its proper divisors (277356583488).

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

121121113200 is a wasteful number, since it uses less digits than its factorization.

121121113200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2728011 (or 2728000 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 121121113200 its reverse (2311121121), we get a palindrome (123432234321).

The spelling of 121121113200 in words is "one hundred twenty-one billion, one hundred twenty-one million, one hundred thirteen thousand, two hundred".