21011101223110 has 32 divisors (see below), whose sum is σ = 39130561880064. Its totient is φ = 8114458620000.

The previous prime is 21011101223093. The next prime is 21011101223149. The reversal of 21011101223110 is 1132210111012.

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 (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78494866 + ... + 78762085.

It is an arithmetic number, because the mean of its divisors is an integer number (1222830058752).

Almost surely, 2^{21011101223110} is an apocalyptic number.

21011101223110 is a deficient number, since it is larger than the sum of its proper divisors (18119460656954).

21011101223110 is a wasteful number, since it uses less digits than its factorization.

21011101223110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157257420.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 21011101223110 its reverse (1132210111012), we get a palindrome (22143311334122).

The spelling of 21011101223110 in words is "twenty-one trillion, eleven billion, one hundred one million, two hundred twenty-three thousand, one hundred ten".