21133220110 has 32 divisors (see below), whose sum is σ = 38555095392. Its totient is φ = 8339435520.

The previous prime is 21133220093. The next prime is 21133220131. The reversal of 21133220110 is 1102233112.

It is a super-2 number, since 2×21133220110² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 216894 + ... + 298846.

It is an arithmetic number, because the mean of its divisors is an integer number (1204846731).

Almost surely, 2^21133220110 is an apocalyptic number.

21133220110 is a deficient number, since it is larger than the sum of its proper divisors (17421875282).

21133220110 is a wasteful number, since it uses less digits than its factorization.

21133220110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82308.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21133220110 its reverse (1102233112), we get a palindrome (22235453222).

It can be divided in two parts, 2113 and 3220110, that added together give a palindrome (3222223).

The spelling of 21133220110 in words is "twenty-one billion, one hundred thirty-three million, two hundred twenty thousand, one hundred ten".