200111121 has 32 divisors (see below), whose sum is σ = 346705920. Its totient is φ = 111685392.

The previous prime is 200111117. The next prime is 200111123. The reversal of 200111121 is 121111002.

It is a happy number.

It is not a de Polignac number, because 200111121 - 2² = 200111117 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (200111123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4185 + ... + 20438.

It is an arithmetic number, because the mean of its divisors is an integer number (10834560).

Almost surely, 2^200111121 is an apocalyptic number.

200111121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

200111121 is a deficient number, since it is larger than the sum of its proper divisors (146594799).

200111121 is a wasteful number, since it uses less digits than its factorization.

200111121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24682 (or 24676 counting only the distinct ones).

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

The square root of 200111121 is about 14146.0637988099. The cubic root of 200111121 is about 584.9118341819.

Adding to 200111121 its reverse (121111002), we get a palindrome (321222123).

The spelling of 200111121 in words is "two hundred million, one hundred eleven thousand, one hundred twenty-one".