210021122221000 has 32 divisors (see below), whose sum is σ = 491449425999480. Its totient is φ = 84008448888000.

The previous prime is 210021122220971. The next prime is 210021122221063. The reversal of 210021122221000 is 122221120012.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 104353947682884 + 105667174538116 = 10215378^2 + 10279454^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105010560111 + ... + 105010562110.

Almost surely, 2^{210021122221000} is an apocalyptic number.

210021122221000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210021122221000 is an abundant number, since it is smaller than the sum of its proper divisors (281428303778480).

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

210021122221000 is a wasteful number, since it uses less digits than its factorization.

210021122221000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210021122242 (or 210021122228 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 210021122221000 its reverse (122221120012), we get a palindrome (210143343341012).

The spelling of 210021122221000 in words is "two hundred ten trillion, twenty-one billion, one hundred twenty-two million, two hundred twenty-one thousand".