200121001212 has 36 divisors (see below), whose sum is σ = 513257998568. Its totient is φ = 60642727200.

The previous prime is 200121001193. The next prime is 200121001253. The reversal of 200121001212 is 212100121002.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68910739 + ... + 68913642.

Almost surely, 2^200121001212 is an apocalyptic number.

200121001212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

200121001212 is an abundant number, since it is smaller than the sum of its proper divisors (313136997356).

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

200121001212 is a wasteful number, since it uses less digits than its factorization.

200121001212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137824410 (or 137824397 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 200121001212 its reverse (212100121002), we get a palindrome (412221122214).

The spelling of 200121001212 in words is "two hundred billion, one hundred twenty-one million, one thousand, two hundred twelve".