21222200110 has 32 divisors (see below), whose sum is σ = 39453946560. Its totient is φ = 8214605568.

The previous prime is 21222200101. The next prime is 21222200123. The reversal of 21222200110 is 1100222212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 235570 + ... + 312949.

It is an arithmetic number, because the mean of its divisors is an integer number (1232935830).

Almost surely, 2^21222200110 is an apocalyptic number.

21222200110 is a deficient number, since it is larger than the sum of its proper divisors (18231746450).

21222200110 is a wasteful number, since it uses less digits than its factorization.

21222200110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548652.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21222200110 its reverse (1100222212), we get a palindrome (22322422322).

The spelling of 21222200110 in words is "twenty-one billion, two hundred twenty-two million, two hundred thousand, one hundred ten".