21000110202 has 96 divisors (see below), whose sum is σ = 49411065600. Its totient is φ = 6423318144.

The previous prime is 21000110177. The next prime is 21000110203. The reversal of 21000110202 is 20201100012.

It is a super-3 number, since 3×21000110202³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (21000110203) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2894143 + ... + 2901389.

It is an arithmetic number, because the mean of its divisors is an integer number (514698600).

Almost surely, 2^21000110202 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21000110202, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24705532800).

21000110202 is an abundant number, since it is smaller than the sum of its proper divisors (28410955398).

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

21000110202 is a wasteful number, since it uses less digits than its factorization.

21000110202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7540 (or 7537 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 21000110202 its reverse (20201100012), we get a palindrome (41201210214).

The spelling of 21000110202 in words is "twenty-one billion, one hundred ten thousand, two hundred two".