21112343413 has 4 divisors (see below), whose sum is σ = 24128392480. Its totient is φ = 18096294348.

The previous prime is 21112343407. The next prime is 21112343431. The reversal of 21112343413 is 31434321112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21112343413 - 2⁵ = 21112343381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112343113) 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, 1508024523 + ... + 1508024536.

It is an arithmetic number, because the mean of its divisors is an integer number (6032098120).

Almost surely, 2^21112343413 is an apocalyptic number.

It is an amenable number.

21112343413 is a deficient number, since it is larger than the sum of its proper divisors (3016049067).

21112343413 is an equidigital number, since it uses as much as digits as its factorization.

21112343413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3016049066.

The product of its digits is 1728, while the sum is 25.

Adding to 21112343413 its reverse (31434321112), we get a palindrome (52546664525).

The spelling of 21112343413 in words is "twenty-one billion, one hundred twelve million, three hundred forty-three thousand, four hundred thirteen".