21013232411 has 4 divisors (see below), whose sum is σ = 21013525512. Its totient is φ = 21012939312.

The previous prime is 21013232393. The next prime is 21013232431. The reversal of 21013232411 is 11423231012.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 21013232411 - 2¹⁸ = 21012970267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21013232431) 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, 40976 + ... + 209058.

It is an arithmetic number, because the mean of its divisors is an integer number (5253381378).

Almost surely, 2^21013232411 is an apocalyptic number.

21013232411 is a deficient number, since it is larger than the sum of its proper divisors (293101).

21013232411 is a wasteful number, since it uses less digits than its factorization.

21013232411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293100.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21013232411 its reverse (11423231012), we get a palindrome (32436463423).

The spelling of 21013232411 in words is "twenty-one billion, thirteen million, two hundred thirty-two thousand, four hundred eleven".