221021221112110 has 16 divisors (see below), whose sum is σ = 398701187593632. Its totient is φ = 88216712980000.

The previous prime is 221021221111997. The next prime is 221021221112119. The reversal of 221021221112110 is 11211122120122.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221021221112119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23971928266 + ... + 23971937485.

It is an arithmetic number, because the mean of its divisors is an integer number (24918824224602).

Almost surely, 2^{221021221112110} is an apocalyptic number.

221021221112110 is a deficient number, since it is larger than the sum of its proper divisors (177679966481522).

221021221112110 is a wasteful number, since it uses less digits than its factorization.

221021221112110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47943866219.

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

Adding to 221021221112110 its reverse (11211122120122), we get a palindrome (232232343232232).

The spelling of 221021221112110 in words is "two hundred twenty-one trillion, twenty-one billion, two hundred twenty-one million, one hundred twelve thousand, one hundred ten".