21040312033215 has 64 divisors (see below), whose sum is σ = 37445629795200. Its totient is φ = 11209314235392.

The previous prime is 21040312033187. The next prime is 21040312033309. The reversal of 21040312033215 is 51233021304012.

21040312033215 is a `hidden beast` number, since 2 + 1 + 0 + 4 + 0 + 312 + 0 + 332 + 15 = 666.

It is not a de Polignac number, because 21040312033215 - 2⁸ = 21040312032959 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1429653037 + ... + 1429667753.

It is an arithmetic number, because the mean of its divisors is an integer number (585087965550).

Almost surely, 2^{21040312033215} is an apocalyptic number.

21040312033215 is a deficient number, since it is larger than the sum of its proper divisors (16405317761985).

21040312033215 is a wasteful number, since it uses less digits than its factorization.

21040312033215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25513 (or 25507 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

Adding to 21040312033215 its reverse (51233021304012), we get a palindrome (72273333337227).

The spelling of 21040312033215 in words is "twenty-one trillion, forty billion, three hundred twelve million, thirty-three thousand, two hundred fifteen".