21313232110 has 16 divisors (see below), whose sum is σ = 38385151632. Its totient is φ = 8520552000.

The previous prime is 21313232099. The next prime is 21313232111. The reversal of 21313232110 is 1123231312.

It is a super-3 number, since 3×21313232110³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21313232111) 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, 573696 + ... + 609715.

It is an arithmetic number, because the mean of its divisors is an integer number (2399071977).

Almost surely, 2^21313232110 is an apocalyptic number.

21313232110 is a deficient number, since it is larger than the sum of its proper divisors (17071919522).

21313232110 is a wasteful number, since it uses less digits than its factorization.

21313232110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1185219.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21313232110 its reverse (1123231312), we get a palindrome (22436463422).

The spelling of 21313232110 in words is "twenty-one billion, three hundred thirteen million, two hundred thirty-two thousand, one hundred ten".