21431411011 has 2 divisors, whose sum is σ = 21431411012. Its totient is φ = 21431411010.

The previous prime is 21431410999. The next prime is 21431411033. The reversal of 21431411011 is 11011413412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21431411011 - 2¹⁷ = 21431279939 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21431411011.

It is not a weakly prime, because it can be changed into another prime (21431411051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10715705505 + 10715705506.

It is an arithmetic number, because the mean of its divisors is an integer number (10715705506).

Almost surely, 2^21431411011 is an apocalyptic number.

21431411011 is a deficient number, since it is larger than the sum of its proper divisors (1).

21431411011 is an equidigital number, since it uses as much as digits as its factorization.

21431411011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 21431411011 its reverse (11011413412), we get a palindrome (32442824423).

The spelling of 21431411011 in words is "twenty-one billion, four hundred thirty-one million, four hundred eleven thousand, eleven".