21112320110 has 32 divisors (see below), whose sum is σ = 43441168320. Its totient is φ = 7236824832.

The previous prime is 21112320071. The next prime is 21112320113. The reversal of 21112320110 is 1102321112.

It is a super-2 number, since 2×21112320110² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112320113) 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, 288986 + ... + 354594.

It is an arithmetic number, because the mean of its divisors is an integer number (1357536510).

Almost surely, 2^21112320110 is an apocalyptic number.

21112320110 is an abundant number, since it is smaller than the sum of its proper divisors (22328848210).

21112320110 is a wasteful number, since it uses less digits than its factorization.

21112320110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70220.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21112320110 its reverse (1102321112), we get a palindrome (22214641222).

The spelling of 21112320110 in words is "twenty-one billion, one hundred twelve million, three hundred twenty thousand, one hundred ten".