21144122014 has 16 divisors (see below), whose sum is σ = 32409965952. Its totient is φ = 10343273688.

The previous prime is 21144121987. The next prime is 21144122017. The reversal of 21144122014 is 41022144112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21144122017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 601224 + ... + 635419.

It is an arithmetic number, because the mean of its divisors is an integer number (2025622872).

Almost surely, 2^21144122014 is an apocalyptic number.

21144122014 is a deficient number, since it is larger than the sum of its proper divisors (11265843938).

21144122014 is a wasteful number, since it uses less digits than its factorization.

21144122014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236831.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 21144122014 its reverse (41022144112), we get a palindrome (62166266126).

The spelling of 21144122014 in words is "twenty-one billion, one hundred forty-four million, one hundred twenty-two thousand, fourteen".