21243014411 has 8 divisors (see below), whose sum is σ = 22500419760. Its totient is φ = 19986477568.

The previous prime is 21243014339. The next prime is 21243014447. The reversal of 21243014411 is 11441034212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21243014411 is a prime.

It is a super-2 number, since 2×21243014411² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21242014411) 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, 166421 + ... + 264918.

It is an arithmetic number, because the mean of its divisors is an integer number (2812552470).

Almost surely, 2^21243014411 is an apocalyptic number.

21243014411 is a deficient number, since it is larger than the sum of its proper divisors (1257405349).

21243014411 is a wasteful number, since it uses less digits than its factorization.

21243014411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434253.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 21243014411 its reverse (11441034212), we get a palindrome (32684048623).

The spelling of 21243014411 in words is "twenty-one billion, two hundred forty-three million, fourteen thousand, four hundred eleven".