2001121212200 has 48 divisors (see below), whose sum is σ = 5075571080160. Its totient is φ = 727680440000.

The previous prime is 2001121212191. The next prime is 2001121212247. The reversal of 2001121212200 is 22121211002.

It is a super-2 number, since 2×2001121212200² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 454798076 + ... + 454802475.

It is an arithmetic number, because the mean of its divisors is an integer number (105741064170).

Almost surely, 2^{2001121212200} is an apocalyptic number.

2001121212200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001121212200 is an abundant number, since it is smaller than the sum of its proper divisors (3074449867960).

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

2001121212200 is a wasteful number, since it uses less digits than its factorization.

2001121212200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909600578 (or 909600569 counting only the distinct ones).

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

Adding to 2001121212200 its reverse (22121211002), we get a palindrome (2023242423202).

The spelling of 2001121212200 in words is "two trillion, one billion, one hundred twenty-one million, two hundred twelve thousand, two hundred".