221000221120210 has 128 divisors (see below), whose sum is σ = 465085557619200. Its totient is φ = 75579115917312.

The previous prime is 221000221120171. The next prime is 221000221120223. The reversal of 221000221120210 is 12021122000122.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7584850762 + ... + 7584879898.

It is an arithmetic number, because the mean of its divisors is an integer number (3633480918900).

Almost surely, 2^{221000221120210} is an apocalyptic number.

221000221120210 is an abundant number, since it is smaller than the sum of its proper divisors (244085336498990).

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

221000221120210 is a wasteful number, since it uses less digits than its factorization.

221000221120210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34705 (or 34691 counting only the distinct ones).

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

Adding to 221000221120210 its reverse (12021122000122), we get a palindrome (233021343120332).

The spelling of 221000221120210 in words is "two hundred twenty-one trillion, two hundred twenty-one million, one hundred twenty thousand, two hundred ten".