21121200002200 has 48 divisors (see below), whose sum is σ = 49226855697000. Its totient is φ = 8427823537920.

The previous prime is 21121200002131. The next prime is 21121200002219. The reversal of 21121200002200 is 220000212112.

It is a happy number.

It is a super-2 number, since 2×21121200002200² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 129020890 + ... + 129184489.

Almost surely, 2^{21121200002200} is an apocalyptic number.

21121200002200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21121200002200 is an abundant number, since it is smaller than the sum of its proper divisors (28105655694800).

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

21121200002200 is a wasteful number, since it uses less digits than its factorization.

21121200002200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258205804 (or 258205795 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21121200002200 its reverse (220000212112), we get a palindrome (21341200214312).

The spelling of 21121200002200 in words is "twenty-one trillion, one hundred twenty-one billion, two hundred million, two thousand, two hundred".