21216351120526 has 8 divisors (see below), whose sum is σ = 31824671483160. Its totient is φ = 10608127292808.

The previous prime is 21216351120521. The next prime is 21216351120527. The reversal of 21216351120526 is 62502115361212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21216351120521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23581756 + ... + 24464911.

It is an arithmetic number, because the mean of its divisors is an integer number (3978083935395).

Almost surely, 2^{21216351120526} is an apocalyptic number.

21216351120526 is a deficient number, since it is larger than the sum of its proper divisors (10608320362634).

21216351120526 is a wasteful number, since it uses less digits than its factorization.

21216351120526 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48267458.

The product of its (nonzero) digits is 43200, while the sum is 37.

Adding to 21216351120526 its reverse (62502115361212), we get a palindrome (83718466481738).

The spelling of 21216351120526 in words is "twenty-one trillion, two hundred sixteen billion, three hundred fifty-one million, one hundred twenty thousand, five hundred twenty-six".