200012121 has 24 divisors (see below), whose sum is σ = 300510080. Its totient is φ = 128078496.

The previous prime is 200012083. The next prime is 200012129. The reversal of 200012121 is 121210002.

It is a de Polignac number, because none of the positive numbers 2^k-200012121 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (200012129) 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, 22506 + ... + 30108.

Almost surely, 2^200012121 is an apocalyptic number.

It is an amenable number.

200012121 is a deficient number, since it is larger than the sum of its proper divisors (100497959).

200012121 is a wasteful number, since it uses less digits than its factorization.

200012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7725 (or 7722 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 200012121 is about 14142.5641593029. The cubic root of 200012121 is about 584.8153614103.

Adding to 200012121 its reverse (121210002), we get a palindrome (321222123).

It can be divided in two parts, 20001 and 2121, that added together give a palindrome (22122).

The spelling of 200012121 in words is "two hundred million, twelve thousand, one hundred twenty-one".