21011221100110 has 64 divisors (see below), whose sum is σ = 39527559235584. Its totient is φ = 8031927945600.

The previous prime is 21011221100063. The next prime is 21011221100183. The reversal of 21011221100110 is 1100112211012.

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 (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60059517 + ... + 60408343.

It is an arithmetic number, because the mean of its divisors is an integer number (617618113056).

Almost surely, 2^{21011221100110} is an apocalyptic number.

21011221100110 is a deficient number, since it is larger than the sum of its proper divisors (18516338135474).

21011221100110 is a wasteful number, since it uses less digits than its factorization.

21011221100110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351289.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 21011221100110 its reverse (1100112211012), we get a palindrome (22111333311122).

The spelling of 21011221100110 in words is "twenty-one trillion, eleven billion, two hundred twenty-one million, one hundred thousand, one hundred ten".