21330011310 has 32 divisors (see below), whose sum is σ = 51313653792. Its totient is φ = 5674488960.

The previous prime is 21330011237. The next prime is 21330011383. The reversal of 21330011310 is 1311003312.

It is an interprime number because it is at equal distance from previous prime (21330011237) and next prime (21330011383).

It is a super-2 number, since 2×21330011310² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 21330011310.

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, 831789 + ... + 857048.

It is an arithmetic number, because the mean of its divisors is an integer number (1603551681).

Almost surely, 2^21330011310 is an apocalyptic number.

21330011310 is an abundant number, since it is smaller than the sum of its proper divisors (29983642482).

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

21330011310 is a wasteful number, since it uses less digits than its factorization.

21330011310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1689268.

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 21330011310 its reverse (1311003312), we get a palindrome (22641014622).

The spelling of 21330011310 in words is "twenty-one billion, three hundred thirty million, eleven thousand, three hundred ten".