21125110630635 has 48 divisors (see below), whose sum is σ = 39947118932448. Its totient is φ = 10242104755200.

The previous prime is 21125110630633. The next prime is 21125110630661. The reversal of 21125110630635 is 53603601152112.

21125110630635 is a `hidden beast` number, since 2 + 1 + 1 + 2 + 5 + 1 + 10 + 6 + 3 + 0 + 635 = 666.

It is not a de Polignac number, because 21125110630635 - 2¹ = 21125110630633 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21125110630635.

It is not an unprimeable number, because it can be changed into a prime (21125110630633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13073365 + ... + 14600105.

It is an arithmetic number, because the mean of its divisors is an integer number (832231644426).

Almost surely, 2^{21125110630635} is an apocalyptic number.

21125110630635 is a deficient number, since it is larger than the sum of its proper divisors (18822008301813).

21125110630635 is a wasteful number, since it uses less digits than its factorization.

21125110630635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1554716 (or 1554713 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

Adding to 21125110630635 its reverse (53603601152112), we get a palindrome (74728711782747).

The spelling of 21125110630635 in words is "twenty-one trillion, one hundred twenty-five billion, one hundred ten million, six hundred thirty thousand, six hundred thirty-five".