21102130750 has 16 divisors (see below), whose sum is σ = 39503189232. Its totient is φ = 8440852200.

The previous prime is 21102130727. The next prime is 21102130757. The reversal of 21102130750 is 5703120112.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21102130757) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42204012 + ... + 42204511.

It is an arithmetic number, because the mean of its divisors is an integer number (2468949327).

Almost surely, 2^21102130750 is an apocalyptic number.

21102130750 is a deficient number, since it is larger than the sum of its proper divisors (18401058482).

21102130750 is an equidigital number, since it uses as much as digits as its factorization.

21102130750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84408540 (or 84408530 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 22.

Adding to 21102130750 its reverse (5703120112), we get a palindrome (26805250862).

The spelling of 21102130750 in words is "twenty-one billion, one hundred two million, one hundred thirty thousand, seven hundred fifty".