121121200210000 has 200 divisors, whose sum is σ = 294159243210624. Its totient is φ = 48297902400000.

The previous prime is 121121200209917. The next prime is 121121200210061. The reversal of 121121200210000 is 12002121121.

It is a tau number, because it is divible by the number of its divisors (200).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4787197350 + ... + 4787222650.

Almost surely, 2^{121121200210000} is an apocalyptic number.

121121200210000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121121200210000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147079621605312).

121121200210000 is an abundant number, since it is smaller than the sum of its proper divisors (173038043000624).

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

121121200210000 is an equidigital number, since it uses as much as digits as its factorization.

121121200210000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26799 (or 26778 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 121121200210000 its reverse (12002121121), we get a palindrome (121133202331121).

The spelling of 121121200210000 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, two hundred million, two hundred ten thousand".