20021021210200 has 48 divisors (see below), whose sum is σ = 46557329548680. Its totient is φ = 8006953820160.

The previous prime is 20021021210191. The next prime is 20021021210237. The reversal of 20021021210200 is 201212012002.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7987497 + ... + 10190296.

Almost surely, 2^{20021021210200} is an apocalyptic number.

20021021210200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20021021210200 is an abundant number, since it is smaller than the sum of its proper divisors (26536308338480).

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

20021021210200 is a wasteful number, since it uses less digits than its factorization.

20021021210200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18183316 (or 18183307 counting only the distinct ones).

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

Adding to 20021021210200 its reverse (201212012002), we get a palindrome (20222233222202).

The spelling of 20021021210200 in words is "twenty trillion, twenty-one billion, twenty-one million, two hundred ten thousand, two hundred".