221201220011222 has 16 divisors (see below), whose sum is σ = 377703268952832. Its totient is φ = 96174443482920.

The previous prime is 221201220011207. The next prime is 221201220011249. The reversal of 221201220011222 is 222110022102122.

It is a junction number, because it is equal to n+sod(n) for n = 221201220011194 and 221201220011203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 218578280138 + ... + 218578281149.

It is an arithmetic number, because the mean of its divisors is an integer number (23606454309552).

Almost surely, 2^{221201220011222} is an apocalyptic number.

221201220011222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221201220011222 is a deficient number, since it is larger than the sum of its proper divisors (156502048941610).

221201220011222 is a wasteful number, since it uses less digits than its factorization.

221201220011222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437156561323.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 221201220011222 its reverse (222110022102122), we get a palindrome (443311242113344).

The spelling of 221201220011222 in words is "two hundred twenty-one trillion, two hundred one billion, two hundred twenty million, eleven thousand, two hundred twenty-two".