121799878200 has 2880 divisors, whose sum is σ = 614224749600. Its totient is φ = 21946982400.

The previous prime is 121799878181. The next prime is 121799878231. The reversal of 121799878200 is 2878997121.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 719 ways as a sum of consecutive naturals, for example, 3291888582 + ... + 3291888618.

Almost surely, 2^121799878200 is an apocalyptic number.

121799878200 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 121799878200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (307112374800).

121799878200 is an abundant number, since it is smaller than the sum of its proper divisors (492424871400).

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

121799878200 is a wasteful number, since it uses less digits than its factorization.

121799878200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132 (or 107 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 54.

It can be divided in two parts, 121799 and 878200, that added together give a palindrome (999999).

The spelling of 121799878200 in words is "one hundred twenty-one billion, seven hundred ninety-nine million, eight hundred seventy-eight thousand, two hundred".