221200122201020 has 48 divisors (see below), whose sum is σ = 474533563160160. Its totient is φ = 86581562086656.

The previous prime is 221200122201011. The next prime is 221200122201059. The reversal of 221200122201020 is 20102221002122.

It is a happy number.

221200122201020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 221200122201020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 274900847 + ... + 275704326.

It is an arithmetic number, because the mean of its divisors is an integer number (9886115899170).

Almost surely, 2^{221200122201020} is an apocalyptic number.

221200122201020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221200122201020 is an abundant number, since it is smaller than the sum of its proper divisors (253333440959140).

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

221200122201020 is a wasteful number, since it uses less digits than its factorization.

221200122201020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550605614 (or 550605612 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 221200122201020 its reverse (20102221002122), we get a palindrome (241302343203142).

The spelling of 221200122201020 in words is "two hundred twenty-one trillion, two hundred billion, one hundred twenty-two million, two hundred one thousand, twenty".