21012000212200 has 24 divisors (see below), whose sum is σ = 48852900493830. Its totient is φ = 8404800084800.

The previous prime is 21012000212197. The next prime is 21012000212221. The reversal of 21012000212200 is 221200021012.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 7917256592644 + 13094743619556 = 2813762^2 + 3618666^2 .

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, 52530000331 + ... + 52530000730.

Almost surely, 2^{21012000212200} is an apocalyptic number.

21012000212200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21012000212200 is an abundant number, since it is smaller than the sum of its proper divisors (27840900281630).

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

21012000212200 is a wasteful number, since it uses less digits than its factorization.

21012000212200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105060001077 (or 105060001068 counting only the distinct ones).

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

Adding to 21012000212200 its reverse (221200021012), we get a palindrome (21233200233212).

The spelling of 21012000212200 in words is "twenty-one trillion, twelve billion, two hundred twelve thousand, two hundred".