21112352741 has 4 divisors (see below), whose sum is σ = 21112644000. Its totient is φ = 21112061484.

The previous prime is 21112352711. The next prime is 21112352743. The reversal of 21112352741 is 14725321112.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21112352741 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 (21112352743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58160 + ... + 213558.

It is an arithmetic number, because the mean of its divisors is an integer number (5278161000).

Almost surely, 2^21112352741 is an apocalyptic number.

It is an amenable number.

21112352741 is a deficient number, since it is larger than the sum of its proper divisors (291259).

21112352741 is a wasteful number, since it uses less digits than its factorization.

21112352741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291258.

The product of its digits is 3360, while the sum is 29.

Adding to 21112352741 its reverse (14725321112), we get a palindrome (35837673853).

The spelling of 21112352741 in words is "twenty-one billion, one hundred twelve million, three hundred fifty-two thousand, seven hundred forty-one".