21012220010200 has 48 divisors (see below), whose sum is σ = 48925573451280. Its totient is φ = 8392473048960.

The previous prime is 21012220010183. The next prime is 21012220010233. The reversal of 21012220010200 is 201002221012.

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 (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77457732 + ... + 77728531.

It is an arithmetic number, because the mean of its divisors is an integer number (1019282780235).

Almost surely, 2^{21012220010200} is an apocalyptic number.

21012220010200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21012220010200 is an abundant number, since it is smaller than the sum of its proper divisors (27913353441080).

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

21012220010200 is a wasteful number, since it uses less digits than its factorization.

21012220010200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155186956 (or 155186947 counting only the distinct ones).

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

Adding to 21012220010200 its reverse (201002221012), we get a palindrome (21213222231212).

The spelling of 21012220010200 in words is "twenty-one trillion, twelve billion, two hundred twenty million, ten thousand, two hundred".