21220082115 has 16 divisors (see below), whose sum is σ = 33961081248. Its totient is φ = 11314393856.

The previous prime is 21220082099. The next prime is 21220082171. The reversal of 21220082115 is 51128002212.

It is a cyclic number.

It is not a de Polignac number, because 21220082115 - 2⁴ = 21220082099 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127044 + ... + 242033.

It is an arithmetic number, because the mean of its divisors is an integer number (2122567578).

Almost surely, 2^21220082115 is an apocalyptic number.

21220082115 is a deficient number, since it is larger than the sum of its proper divisors (12740999133).

21220082115 is a wasteful number, since it uses less digits than its factorization.

21220082115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372918.

The product of its (nonzero) digits is 640, while the sum is 24.

Adding to 21220082115 its reverse (51128002212), we get a palindrome (72348084327).

The spelling of 21220082115 in words is "twenty-one billion, two hundred twenty million, eighty-two thousand, one hundred fifteen".