221001100001222 has 16 divisors (see below), whose sum is σ = 346479063412320. Its totient is φ = 105523753813632.

The previous prime is 221001100001161. The next prime is 221001100001261. The reversal of 221001100001222 is 222100001100122.

It is a junction number, because it is equal to n+sod(n) for n = 221001100001197 and 221001100001206.

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, 3918708947 + ... + 3918765342.

It is an arithmetic number, because the mean of its divisors is an integer number (21654941463270).

Almost surely, 2^{221001100001222} is an apocalyptic number.

221001100001222 is a deficient number, since it is larger than the sum of its proper divisors (125477963411098).

221001100001222 is a wasteful number, since it uses less digits than its factorization.

221001100001222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7837474927.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 221001100001222 its reverse (222100001100122), we get a palindrome (443101101101344).

The spelling of 221001100001222 in words is "two hundred twenty-one trillion, one billion, one hundred million, one thousand, two hundred twenty-two".