21011002210200 has 96 divisors (see below), whose sum is σ = 66894488188560. Its totient is φ = 5451503270400.

The previous prime is 21011002210193. The next prime is 21011002210207. The reversal of 21011002210200 is 201220011012.

It is an interprime number because it is at equal distance from previous prime (21011002210193) and next prime (21011002210207).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21011002210207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 473198571 + ... + 473242970.

Almost surely, 2^{21011002210200} is an apocalyptic number.

21011002210200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21011002210200 is an abundant number, since it is smaller than the sum of its proper divisors (45883485978360).

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

21011002210200 is a wasteful number, since it uses less digits than its factorization.

21011002210200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 946441597 (or 946441588 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21011002210200 its reverse (201220011012), we get a palindrome (21212222221212).

The spelling of 21011002210200 in words is "twenty-one trillion, eleven billion, two million, two hundred ten thousand, two hundred".