200121111000 has 160 divisors (see below), whose sum is σ = 699534744480. Its totient is φ = 53365608000.

The previous prime is 200121110993. The next prime is 200121111019. The reversal of 200121111000 is 111121002.

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 polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1154316 + ... + 1316315.

It is an arithmetic number, because the mean of its divisors is an integer number (4372092153).

Almost surely, 2^200121111000 is an apocalyptic number.

200121111000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

200121111000 is an abundant number, since it is smaller than the sum of its proper divisors (499413633480).

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

200121111000 is a wasteful number, since it uses less digits than its factorization.

200121111000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2470664 (or 2470641 counting only the distinct ones).

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

Adding to 200121111000 its reverse (111121002), we get a palindrome (200232232002).

The spelling of 200121111000 in words is "two hundred billion, one hundred twenty-one million, one hundred eleven thousand".