211121200121200 has 30 divisors (see below), whose sum is σ = 507218683292144. Its totient is φ = 84448480048320.

The previous prime is 211121200121177. The next prime is 211121200121213. The reversal of 211121200121200 is 2121002121112.

It is a super-2 number, since 2×211121200121200² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 263901499752 + ... + 263901500551.

Almost surely, 2^{211121200121200} is an apocalyptic number.

211121200121200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211121200121200 is an abundant number, since it is smaller than the sum of its proper divisors (296097483170944).

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

211121200121200 is a wasteful number, since it uses less digits than its factorization.

211121200121200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527803000321 (or 527803000310 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 211121200121200 its reverse (2121002121112), we get a palindrome (213242202242312).

The spelling of 211121200121200 in words is "two hundred eleven trillion, one hundred twenty-one billion, two hundred million, one hundred twenty-one thousand, two hundred".