21213040413 has 8 divisors (see below), whose sum is σ = 28287032800. Its totient is φ = 14140537488.

The previous prime is 21213040367. The next prime is 21213040439. The reversal of 21213040413 is 31404031212.

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

It is not a de Polignac number, because 21213040413 - 2⁸ = 21213040157 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21213040413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21213047413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 338698 + ... + 396411.

It is an arithmetic number, because the mean of its divisors is an integer number (3535879100).

Almost surely, 2^21213040413 is an apocalyptic number.

It is an amenable number.

21213040413 is a deficient number, since it is larger than the sum of its proper divisors (7073992387).

21213040413 is an equidigital number, since it uses as much as digits as its factorization.

21213040413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 744731.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21213040413 its reverse (31404031212), we get a palindrome (52617071625).

The spelling of 21213040413 in words is "twenty-one billion, two hundred thirteen million, forty thousand, four hundred thirteen".