211121100200 has 48 divisors (see below), whose sum is σ = 491111392380. Its totient is φ = 84404597760.

The previous prime is 211121100191. The next prime is 211121100209. The reversal of 211121100200 is 2001121112.

It is an interprime number because it is at equal distance from previous prime (211121100191) and next prime (211121100209).

It can be written as a sum of positive squares in 6 ways, for example, as 25613441764 + 185507658436 = 160042^2 + 430706^2 .

It is not an unprimeable number, because it can be changed into a prime (211121100209) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 113552 + ... + 659648.

Almost surely, 2^211121100200 is an apocalyptic number.

211121100200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211121100200 is an abundant number, since it is smaller than the sum of its proper divisors (279990292180).

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

211121100200 is a wasteful number, since it uses less digits than its factorization.

211121100200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548046 (or 548037 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 211121100200 its reverse (2001121112), we get a palindrome (213122221312).

The spelling of 211121100200 in words is "two hundred eleven billion, one hundred twenty-one million, one hundred thousand, two hundred".