21411013125 has 40 divisors (see below), whose sum is σ = 35732112064. Its totient is φ = 11400480000.

The previous prime is 21411013123. The next prime is 21411013159. The reversal of 21411013125 is 52131011412.

It is not a de Polignac number, because 21411013125 - 2¹ = 21411013123 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21411013123) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1174077 + ... + 1192173.

Almost surely, 2^21411013125 is an apocalyptic number.

21411013125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21411013125 is a deficient number, since it is larger than the sum of its proper divisors (14321098939).

21411013125 is an equidigital number, since it uses as much as digits as its factorization.

21411013125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18751 (or 18736 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 21.

Adding to 21411013125 its reverse (52131011412), we get a palindrome (73542024537).

The spelling of 21411013125 in words is "twenty-one billion, four hundred eleven million, thirteen thousand, one hundred twenty-five".