21001022010200 has 48 divisors (see below), whose sum is σ = 48827895324360. Its totient is φ = 8400319488000.

The previous prime is 21001022010197. The next prime is 21001022010209. The reversal of 21001022010200 is 201022010012.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21001022010209) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20229815 + ... + 21242585.

Almost surely, 2^{21001022010200} is an apocalyptic number.

21001022010200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21001022010200 is an abundant number, since it is smaller than the sum of its proper divisors (27826873314160).

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

21001022010200 is a wasteful number, since it uses less digits than its factorization.

21001022010200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1116468 (or 1116459 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21001022010200 its reverse (201022010012), we get a palindrome (21202044020212).

The spelling of 21001022010200 in words is "twenty-one trillion, one billion, twenty-two million, ten thousand, two hundred".