21223330110 has 48 divisors (see below), whose sum is σ = 55488972240. Its totient is φ = 5627932800.

The previous prime is 21223330091. The next prime is 21223330151. The reversal of 21223330110 is 1103332212.

21223330110 is a `hidden beast` number, since 2 + 1 + 223 + 330 + 110 = 666.

It is a super-2 number, since 2×21223330110² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 642591 + ... + 674810.

It is an arithmetic number, because the mean of its divisors is an integer number (1156020255).

Almost surely, 2^21223330110 is an apocalyptic number.

21223330110 is an abundant number, since it is smaller than the sum of its proper divisors (34265642130).

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

21223330110 is a wasteful number, since it uses less digits than its factorization.

21223330110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1317593 (or 1317590 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21223330110 its reverse (1103332212), we get a palindrome (22326662322).

The spelling of 21223330110 in words is "twenty-one billion, two hundred twenty-three million, three hundred thirty thousand, one hundred ten".