21510206061052 has 12 divisors (see below), whose sum is σ = 37642919919696. Its totient is φ = 10755086084000.

The previous prime is 21510206061049. The next prime is 21510206061067. The reversal of 21510206061052 is 25016060201512.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1127128 + ... + 6655135.

It is an arithmetic number, because the mean of its divisors is an integer number (3136909993308).

Almost surely, 2^{21510206061052} is an apocalyptic number.

It is an amenable number.

21510206061052 is a deficient number, since it is larger than the sum of its proper divisors (16132713858644).

21510206061052 is a wasteful number, since it uses less digits than its factorization.

21510206061052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8473268 (or 8473266 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 31.

Adding to 21510206061052 its reverse (25016060201512), we get a palindrome (46526266262564).

The spelling of 21510206061052 in words is "twenty-one trillion, five hundred ten billion, two hundred six million, sixty-one thousand, fifty-two".