21041315411 has 4 divisors (see below), whose sum is σ = 21041842752. Its totient is φ = 21040788072.

The previous prime is 21041315401. The next prime is 21041315413. The reversal of 21041315411 is 11451314012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21041315411 - 2²² = 21037121107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21041315413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198440 + ... + 285413.

It is an arithmetic number, because the mean of its divisors is an integer number (5260460688).

Almost surely, 2^21041315411 is an apocalyptic number.

21041315411 is a deficient number, since it is larger than the sum of its proper divisors (527341).

21041315411 is an equidigital number, since it uses as much as digits as its factorization.

21041315411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527340.

The product of its (nonzero) digits is 480, while the sum is 23.

Adding to 21041315411 its reverse (11451314012), we get a palindrome (32492629423).

The spelling of 21041315411 in words is "twenty-one billion, forty-one million, three hundred fifteen thousand, four hundred eleven".