21222101110 has 128 divisors (see below), whose sum is σ = 47672064000. Its totient is φ = 6636930048.

The previous prime is 21222101101. The next prime is 21222101119. The reversal of 21222101110 is 1110122212.

It is an interprime number because it is at equal distance from previous prime (21222101101) and next prime (21222101119).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222101119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 21945847 + ... + 21946813.

It is an arithmetic number, because the mean of its divisors is an integer number (372438000).

Almost surely, 2^21222101110 is an apocalyptic number.

21222101110 is an abundant number, since it is smaller than the sum of its proper divisors (26449962890).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21222101110 is a wasteful number, since it uses less digits than its factorization.

21222101110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1598.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21222101110 its reverse (1110122212), we get a palindrome (22332223322).

The spelling of 21222101110 in words is "twenty-one billion, two hundred twenty-two million, one hundred one thousand, one hundred ten".