221221233111110 has 16 divisors (see below), whose sum is σ = 398200262510736. Its totient is φ = 88488039264288.

The previous prime is 221221233111077. The next prime is 221221233111113. The reversal of 221221233111110 is 11111332122122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221221233111113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54697364 + ... + 58602423.

It is an arithmetic number, because the mean of its divisors is an integer number (24887516406921).

Almost surely, 2^{221221233111110} is an apocalyptic number.

221221233111110 is a deficient number, since it is larger than the sum of its proper divisors (176979029399626).

221221233111110 is a wasteful number, since it uses less digits than its factorization.

221221233111110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113495047.

The product of its (nonzero) digits is 288, while the sum is 23.

Adding to 221221233111110 its reverse (11111332122122), we get a palindrome (232332565233232).

The spelling of 221221233111110 in words is "two hundred twenty-one trillion, two hundred twenty-one billion, two hundred thirty-three million, one hundred eleven thousand, one hundred ten".