21102133424 has 10 divisors (see below), whose sum is σ = 40885383540. Its totient is φ = 10551066704.

The previous prime is 21102133397. The next prime is 21102133469. The reversal of 21102133424 is 42433120112.

It is a self number, because there is not a number n which added to its sum of digits gives 21102133424.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659441654 + ... + 659441685.

It is an arithmetic number, because the mean of its divisors is an integer number (4088538354).

Almost surely, 2^21102133424 is an apocalyptic number.

It is an amenable number.

21102133424 is a deficient number, since it is larger than the sum of its proper divisors (19783250116).

21102133424 is a wasteful number, since it uses less digits than its factorization.

21102133424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1318883347 (or 1318883341 counting only the distinct ones).

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

Adding to 21102133424 its reverse (42433120112), we get a palindrome (63535253536).

The spelling of 21102133424 in words is "twenty-one billion, one hundred two million, one hundred thirty-three thousand, four hundred twenty-four".