21111213010200 has 96 divisors (see below), whose sum is σ = 67213537708560. Its totient is φ = 5477503910400.

The previous prime is 21111213010169. The next prime is 21111213010201. The reversal of 21111213010200 is 201031211112.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 21111213010200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21111213010201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 475455571 + ... + 475499970.

Almost surely, 2^{21111213010200} is an apocalyptic number.

21111213010200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21111213010200 is an abundant number, since it is smaller than the sum of its proper divisors (46102324698360).

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

21111213010200 is a wasteful number, since it uses less digits than its factorization.

21111213010200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 950955597 (or 950955588 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 21111213010200 its reverse (201031211112), we get a palindrome (21312244221312).

The spelling of 21111213010200 in words is "twenty-one trillion, one hundred eleven billion, two hundred thirteen million, ten thousand, two hundred".