21245024102 has 24 divisors (see below), whose sum is σ = 33307388400. Its totient is φ = 10162037088.

The previous prime is 21245024093. The next prime is 21245024137. The reversal of 21245024102 is 20142054212.

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 11 ways as a sum of consecutive naturals, for example, 125399 + ... + 241277.

It is an arithmetic number, because the mean of its divisors is an integer number (1387807850).

Almost surely, 2^21245024102 is an apocalyptic number.

21245024102 is a deficient number, since it is larger than the sum of its proper divisors (12062364298).

21245024102 is a wasteful number, since it uses less digits than its factorization.

21245024102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116048 (or 116019 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

Adding to 21245024102 its reverse (20142054212), we get a palindrome (41387078314).

The spelling of 21245024102 in words is "twenty-one billion, two hundred forty-five million, twenty-four thousand, one hundred two".