21411013123 has 2 divisors, whose sum is σ = 21411013124. Its totient is φ = 21411013122.

The previous prime is 21411013097. The next prime is 21411013159. The reversal of 21411013123 is 32131011412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21411013123 - 2²¹ = 21408915971 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21411013123.

It is not a weakly prime, because it can be changed into another prime (21421013123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10705506561 + 10705506562.

It is an arithmetic number, because the mean of its divisors is an integer number (10705506562).

Almost surely, 2^21411013123 is an apocalyptic number.

21411013123 is a deficient number, since it is larger than the sum of its proper divisors (1).

21411013123 is an equidigital number, since it uses as much as digits as its factorization.

21411013123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21411013123 its reverse (32131011412), we get a palindrome (53542024535).

The spelling of 21411013123 in words is "twenty-one billion, four hundred eleven million, thirteen thousand, one hundred twenty-three".