21221334110 has 32 divisors (see below), whose sum is σ = 39145047552. Its totient is φ = 8280629280.

The previous prime is 21221334091. The next prime is 21221334133. The reversal of 21221334110 is 1143312212.

21221334110 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84746 + ... + 222765.

It is an arithmetic number, because the mean of its divisors is an integer number (1223282736).

Almost surely, 2^21221334110 is an apocalyptic number.

21221334110 is a deficient number, since it is larger than the sum of its proper divisors (17923713442).

21221334110 is a wasteful number, since it uses less digits than its factorization.

21221334110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307688.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21221334110 its reverse (1143312212), we get a palindrome (22364646322).

The spelling of 21221334110 in words is "twenty-one billion, two hundred twenty-one million, three hundred thirty-four thousand, one hundred ten".