21123117341 has 8 divisors (see below), whose sum is σ = 21616330560. Its totient is φ = 20629994112.

The previous prime is 21123117293. The next prime is 21123117419. The reversal of 21123117341 is 14371132112.

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

It is a cyclic number.

It is not a de Polignac number, because 21123117341 - 2¹⁰ = 21123116317 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21123117341.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21123119341) 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, 792845 + ... + 819053.

It is an arithmetic number, because the mean of its divisors is an integer number (2702041320).

Almost surely, 2^21123117341 is an apocalyptic number.

It is an amenable number.

21123117341 is a deficient number, since it is larger than the sum of its proper divisors (493213219).

21123117341 is a wasteful number, since it uses less digits than its factorization.

21123117341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44995.

The product of its digits is 1008, while the sum is 26.

Adding to 21123117341 its reverse (14371132112), we get a palindrome (35494249453).

The spelling of 21123117341 in words is "twenty-one billion, one hundred twenty-three million, one hundred seventeen thousand, three hundred forty-one".