21330123310 has 64 divisors (see below), whose sum is σ = 40145414400. Its totient is φ = 8153118720.

The previous prime is 21330123307. The next prime is 21330123313. The reversal of 21330123310 is 1332103312.

It is an interprime number because it is at equal distance from previous prime (21330123307) and next prime (21330123313).

It is a super-2 number, since 2×21330123310² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21330123313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4457179 + ... + 4461961.

It is an arithmetic number, because the mean of its divisors is an integer number (627272100).

Almost surely, 2^21330123310 is an apocalyptic number.

21330123310 is a deficient number, since it is larger than the sum of its proper divisors (18815291090).

21330123310 is a wasteful number, since it uses less digits than its factorization.

21330123310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5053.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 21330123310 its reverse (1332103312), we get a palindrome (22662226622).

The spelling of 21330123310 in words is "twenty-one billion, three hundred thirty million, one hundred twenty-three thousand, three hundred ten".