221222211020220 has 96 divisors (see below), whose sum is σ = 634587795636480. Its totient is φ = 57548508183040.

The previous prime is 221222211020021. The next prime is 221222211020227. The reversal of 221222211020220 is 22020112222122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221222211020227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22980871 + ... + 31153889.

It is an arithmetic number, because the mean of its divisors is an integer number (6610289537880).

Almost surely, 2^{221222211020220} is an apocalyptic number.

221222211020220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221222211020220 is an abundant number, since it is smaller than the sum of its proper divisors (413365584616260).

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

221222211020220 is a wasteful number, since it uses less digits than its factorization.

221222211020220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8184075 (or 8184073 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 221222211020220 its reverse (22020112222122), we get a palindrome (243242323242342).

The spelling of 221222211020220 in words is "two hundred twenty-one trillion, two hundred twenty-two billion, two hundred eleven million, twenty thousand, two hundred twenty".