21366360101015 has 16 divisors (see below), whose sum is σ = 26756030379456. Its totient is φ = 16348913222400.

The previous prime is 21366360100871. The next prime is 21366360101071. The reversal of 21366360101015 is 51010106366312.

It is not a de Polignac number, because 21366360101015 - 2¹⁰ = 21366360099991 is a prime.

It is a congruent number.

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, 3768806 + ... + 7545635.

It is an arithmetic number, because the mean of its divisors is an integer number (1672251898716).

Almost surely, 2^{21366360101015} is an apocalyptic number.

21366360101015 is a deficient number, since it is larger than the sum of its proper divisors (5389670278441).

21366360101015 is a wasteful number, since it uses less digits than its factorization.

21366360101015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11330890.

The product of its (nonzero) digits is 19440, while the sum is 35.

Adding to 21366360101015 its reverse (51010106366312), we get a palindrome (72376466467327).

The spelling of 21366360101015 in words is "twenty-one trillion, three hundred sixty-six billion, three hundred sixty million, one hundred one thousand, fifteen".