221201121221222 has 4 divisors (see below), whose sum is σ = 331801681831836. Its totient is φ = 110600560610610.

The previous prime is 221201121221177. The next prime is 221201121221233. The reversal of 221201121221222 is 222122121102122.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55300280305304 + ... + 55300280305307.

It is an arithmetic number, because the mean of its divisors is an integer number (82950420457959).

Almost surely, 2^{221201121221222} is an apocalyptic number.

221201121221222 is a deficient number, since it is larger than the sum of its proper divisors (110600560610614).

221201121221222 is a wasteful number, since it uses less digits than its factorization.

221201121221222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110600560610613.

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 221201121221222 its reverse (222122121102122), we get a palindrome (443323242323344).

The spelling of 221201121221222 in words is "two hundred twenty-one trillion, two hundred one billion, one hundred twenty-one million, two hundred twenty-one thousand, two hundred twenty-two".