21260034052216 has 16 divisors (see below), whose sum is σ = 39903786782640. Its totient is φ = 10619024243520.

The previous prime is 21260034052199. The next prime is 21260034052247. The reversal of 21260034052216 is 61225043006212.

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, 1374089605 + ... + 1374105076.

It is an arithmetic number, because the mean of its divisors is an integer number (2493986673915).

Almost surely, 2^{21260034052216} is an apocalyptic number.

It is an amenable number.

21260034052216 is a deficient number, since it is larger than the sum of its proper divisors (18643752730424).

21260034052216 is a wasteful number, since it uses less digits than its factorization.

21260034052216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2748195654 (or 2748195650 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

Adding to 21260034052216 its reverse (61225043006212), we get a palindrome (82485077058428).

The spelling of 21260034052216 in words is "twenty-one trillion, two hundred sixty billion, thirty-four million, fifty-two thousand, two hundred sixteen".