121355353200 has 120 divisors (see below), whose sum is σ = 389050978608. Its totient is φ = 32335677440.

The previous prime is 121355353151. The next prime is 121355353201. The reversal of 121355353200 is 2353553121.

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 (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121355353201) 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, 1492804 + ... + 1571996.

Almost surely, 2^121355353200 is an apocalyptic number.

121355353200 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 121355353200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (194525489304).

121355353200 is an abundant number, since it is smaller than the sum of its proper divisors (267695625408).

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

121355353200 is a wasteful number, since it uses less digits than its factorization.

121355353200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80491 (or 80480 counting only the distinct ones).

The product of its (nonzero) digits is 13500, while the sum is 30.

The spelling of 121355353200 in words is "one hundred twenty-one billion, three hundred fifty-five million, three hundred fifty-three thousand, two hundred".