21012222210200 has 72 divisors (see below), whose sum is σ = 52900445321100. Its totient is φ = 7758358957440.

The previous prime is 21012222210197. The next prime is 21012222210271. The reversal of 21012222210200 is 201222221012.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 310797890 + ... + 310865489.

Almost surely, 2^{21012222210200} is an apocalyptic number.

21012222210200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21012222210200 is an abundant number, since it is smaller than the sum of its proper divisors (31888223110900).

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

21012222210200 is a wasteful number, since it uses less digits than its factorization.

21012222210200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621663421 (or 621663399 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21012222210200 its reverse (201222221012), we get a palindrome (21213444431212).

The spelling of 21012222210200 in words is "twenty-one trillion, twelve billion, two hundred twenty-two million, two hundred ten thousand, two hundred".