21041053412215 has 8 divisors (see below), whose sum is σ = 25249294633248. Its totient is φ = 16832822370720.

The previous prime is 21041053412209. The next prime is 21041053412227. The reversal of 21041053412215 is 51221435014012.

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

It is not a de Polignac number, because 21041053412215 - 2⁷ = 21041053412087 is a prime.

It is a super-2 number, since 2×21041053412215² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3168645 + ... + 7219585.

It is an arithmetic number, because the mean of its divisors is an integer number (3156161829156).

Almost surely, 2^{21041053412215} is an apocalyptic number.

21041053412215 is a deficient number, since it is larger than the sum of its proper divisors (4208241221033).

21041053412215 is a wasteful number, since it uses less digits than its factorization.

21041053412215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5089769.

The product of its (nonzero) digits is 9600, while the sum is 31.

Adding to 21041053412215 its reverse (51221435014012), we get a palindrome (72262488426227).

The spelling of 21041053412215 in words is "twenty-one trillion, forty-one billion, fifty-three million, four hundred twelve thousand, two hundred fifteen".