21102011310 has 64 divisors (see below), whose sum is σ = 52107535872. Its totient is φ = 5465229696.

The previous prime is 21102011297. The next prime is 21102011341. The reversal of 21102011310 is 1311020112.

It is a super-2 number, since 2×21102011310² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 608047 + ... + 641813.

It is an arithmetic number, because the mean of its divisors is an integer number (814180248).

Almost surely, 2^21102011310 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21102011310, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26053767936).

21102011310 is an abundant number, since it is smaller than the sum of its proper divisors (31005524562).

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

21102011310 is a wasteful number, since it uses less digits than its factorization.

21102011310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34377.

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 21102011310 its reverse (1311020112), we get a palindrome (22413031422).

The spelling of 21102011310 in words is "twenty-one billion, one hundred two million, eleven thousand, three hundred ten".