221021222111110 has 8 divisors (see below), whose sum is σ = 397838199800016. Its totient is φ = 88408488844440.

The previous prime is 221021222111047. The next prime is 221021222111119. The reversal of 221021222111110 is 11111222120122.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221021222111119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11051061105546 + ... + 11051061105565.

It is an arithmetic number, because the mean of its divisors is an integer number (49729774975002).

Almost surely, 2^{221021222111110} is an apocalyptic number.

221021222111110 is a deficient number, since it is larger than the sum of its proper divisors (176816977688906).

221021222111110 is a wasteful number, since it uses less digits than its factorization.

221021222111110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22102122211118.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 221021222111110 its reverse (11111222120122), we get a palindrome (232132444231232).

The spelling of 221021222111110 in words is "two hundred twenty-one trillion, twenty-one billion, two hundred twenty-two million, one hundred eleven thousand, one hundred ten".