21213241413 has 32 divisors (see below), whose sum is σ = 35752340736. Its totient is φ = 10886980608.

The previous prime is 21213241411. The next prime is 21213241417. The reversal of 21213241413 is 31414231212.

It is not a de Polignac number, because 21213241413 - 2¹ = 21213241411 is a prime.

It is a super-2 number, since 2×21213241413² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21213241411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1039956 + ... + 1060157.

It is an arithmetic number, because the mean of its divisors is an integer number (1117260648).

Almost surely, 2^21213241413 is an apocalyptic number.

It is an amenable number.

21213241413 is a deficient number, since it is larger than the sum of its proper divisors (14539099323).

21213241413 is a wasteful number, since it uses less digits than its factorization.

21213241413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2100173.

The product of its digits is 1152, while the sum is 24.

Adding to 21213241413 its reverse (31414231212), we get a palindrome (52627472625).

The spelling of 21213241413 in words is "twenty-one billion, two hundred thirteen million, two hundred forty-one thousand, four hundred thirteen".