21210040411 has 8 divisors (see below), whose sum is σ = 24327557600. Its totient is φ = 18114401088.

The previous prime is 21210040363. The next prime is 21210040459. The reversal of 21210040411 is 11404001212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21210040363) and next prime (21210040459).

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

It is not a de Polignac number, because 21210040411 - 2²⁹ = 20673169499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21210040471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5467386 + ... + 5471263.

It is an arithmetic number, because the mean of its divisors is an integer number (3040944700).

Almost surely, 2^21210040411 is an apocalyptic number.

21210040411 is a deficient number, since it is larger than the sum of its proper divisors (3117517189).

21210040411 is a wasteful number, since it uses less digits than its factorization.

21210040411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10938933.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21210040411 its reverse (11404001212), we get a palindrome (32614041623).

The spelling of 21210040411 in words is "twenty-one billion, two hundred ten million, forty thousand, four hundred eleven".