221020221221222 has 32 divisors (see below), whose sum is σ = 337351444697088. Its totient is φ = 108573929460000.

The previous prime is 221020221221221. The next prime is 221020221221257. The reversal of 221020221221222 is 222122122020122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221020221221221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 728251847 + ... + 728555277.

It is an arithmetic number, because the mean of its divisors is an integer number (10542232646784).

Almost surely, 2^{221020221221222} is an apocalyptic number.

221020221221222 is a deficient number, since it is larger than the sum of its proper divisors (116331223475866).

221020221221222 is a wasteful number, since it uses less digits than its factorization.

221020221221222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310316.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 221020221221222 its reverse (222122122020122), we get a palindrome (443142343241344).

The spelling of 221020221221222 in words is "two hundred twenty-one trillion, twenty billion, two hundred twenty-one million, two hundred twenty-one thousand, two hundred twenty-two".