21115441014 has 16 divisors (see below), whose sum is σ = 42415299120. Its totient is φ = 7007744160.

The previous prime is 21115441007. The next prime is 21115441021. The reversal of 21115441014 is 41014451112.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21115441007) and next prime (21115441021).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7682557 + ... + 7685304.

It is an arithmetic number, because the mean of its divisors is an integer number (2650956195).

Almost surely, 2^21115441014 is an apocalyptic number.

21115441014 is an abundant number, since it is smaller than the sum of its proper divisors (21299858106).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21115441014 is a wasteful number, since it uses less digits than its factorization.

21115441014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15368095.

The product of its (nonzero) digits is 640, while the sum is 24.

Adding to 21115441014 its reverse (41014451112), we get a palindrome (62129892126).

The spelling of 21115441014 in words is "twenty-one billion, one hundred fifteen million, four hundred forty-one thousand, fourteen".