200121000111000 has 320 divisors, whose sum is σ = 703825740240480. Its totient is φ = 53038200211200.

The previous prime is 200121000110989. The next prime is 200121000111023. The reversal of 200121000111000 is 111000121002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 5624382 + ... + 20781618.

Almost surely, 2^{200121000111000} is an apocalyptic number.

200121000111000 is a gapful number since it is divisible by the number (20) 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 200121000111000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (351912870120240).

200121000111000 is an abundant number, since it is smaller than the sum of its proper divisors (503704740129480).

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

200121000111000 is a wasteful number, since it uses less digits than its factorization.

200121000111000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15157433 (or 15157410 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 200121000111000 its reverse (111000121002), we get a palindrome (200232000232002).

The spelling of 200121000111000 in words is "two hundred trillion, one hundred twenty-one billion, one hundred eleven thousand".