21211103110 has 16 divisors (see below), whose sum is σ = 38182532832. Its totient is φ = 8483875200.

The previous prime is 21211103051. The next prime is 21211103113. The reversal of 21211103110 is 1130111212.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21211103113) 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 7 ways as a sum of consecutive naturals, for example, 108175 + ... + 232645.

It is an arithmetic number, because the mean of its divisors is an integer number (2386408302).

Almost surely, 2^21211103110 is an apocalyptic number.

21211103110 is a deficient number, since it is larger than the sum of its proper divisors (16971429722).

21211103110 is a wasteful number, since it uses less digits than its factorization.

21211103110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141519.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 21211103110 its reverse (1130111212), we get a palindrome (22341214322).

The spelling of 21211103110 in words is "twenty-one billion, two hundred eleven million, one hundred three thousand, one hundred ten".