21211201110 has 32 divisors (see below), whose sum is σ = 55534781952. Its totient is φ = 5142109280.

The previous prime is 21211201093. The next prime is 21211201111. The reversal of 21211201110 is 1110211212.

21211201110 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 not an unprimeable number, because it can be changed into a prime (21211201111) 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 15 ways as a sum of consecutive naturals, for example, 32137854 + ... + 32138513.

It is an arithmetic number, because the mean of its divisors is an integer number (1735461936).

Almost surely, 2^21211201110 is an apocalyptic number.

21211201110 is an abundant number, since it is smaller than the sum of its proper divisors (34323580842).

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

21211201110 is a wasteful number, since it uses less digits than its factorization.

21211201110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64276388.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21211201110 its reverse (1110211212), we get a palindrome (22321412322).

The spelling of 21211201110 in words is "twenty-one billion, two hundred eleven million, two hundred one thousand, one hundred ten".