200121122012 has 24 divisors (see below), whose sum is σ = 400272996480. Its totient is φ = 85759605360.

The previous prime is 200121121997. The next prime is 200121122041. The reversal of 200121122012 is 210221121002.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105587 + ... + 641397.

It is an arithmetic number, because the mean of its divisors is an integer number (16678041520).

Almost surely, 2^200121122012 is an apocalyptic number.

It is an amenable number.

200121122012 is an abundant number, since it is smaller than the sum of its proper divisors (200151874468).

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

200121122012 is a wasteful number, since it uses less digits than its factorization.

200121122012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549161 (or 549159 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 200121122012 its reverse (210221121002), we get a palindrome (410342243014).

The spelling of 200121122012 in words is "two hundred billion, one hundred twenty-one million, one hundred twenty-two thousand, twelve".