21102134324 has 48 divisors (see below), whose sum is σ = 37573200000. Its totient is φ = 10369130112.

The previous prime is 21102134297. The next prime is 21102134351. The reversal of 21102134324 is 42343120112.

It is an interprime number because it is at equal distance from previous prime (21102134297) and next prime (21102134351).

It is a self number, because there is not a number n which added to its sum of digits gives 21102134324.

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, 29762882 + ... + 29763590.

It is an arithmetic number, because the mean of its divisors is an integer number (782775000).

Almost surely, 2^21102134324 is an apocalyptic number.

It is an amenable number.

21102134324 is a deficient number, since it is larger than the sum of its proper divisors (16471065676).

21102134324 is a wasteful number, since it uses less digits than its factorization.

21102134324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1320 (or 1318 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21102134324 its reverse (42343120112), we get a palindrome (63445254436).

The spelling of 21102134324 in words is "twenty-one billion, one hundred two million, one hundred thirty-four thousand, three hundred twenty-four".