21330110 has 16 divisors (see below), whose sum is σ = 38447136. Its totient is φ = 8520288.

The previous prime is 21330097. The next prime is 21330119. The reversal of 21330110 is 1103312.

It is a super-2 number, since 2×21330110² = 909947185224200, which contains 22 as substring.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 21330091 and 21330100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21330119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12212 + ... + 13848.

It is an arithmetic number, because the mean of its divisors is an integer number (2402946).

Almost surely, 2^21330110 is an apocalyptic number.

21330110 is a deficient number, since it is larger than the sum of its proper divisors (17117026).

21330110 is a wasteful number, since it uses less digits than its factorization.

21330110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2947.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 21330110 is about 4618.4532042666. The cubic root of 21330110 is about 277.3305406960.

Adding to 21330110 its reverse (1103312), we get a palindrome (22433422).

The spelling of 21330110 in words is "twenty-one million, three hundred thirty thousand, one hundred ten".