21114132144 has 60 divisors (see below), whose sum is σ = 63450128664. Its totient is φ = 6032608512.

The previous prime is 21114132133. The next prime is 21114132157. The reversal of 21114132144 is 44123141112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4486197 + ... + 4490900.

Almost surely, 2^21114132144 is an apocalyptic number.

21114132144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21114132144 is an abundant number, since it is smaller than the sum of its proper divisors (42335996520).

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

21114132144 is a wasteful number, since it uses less digits than its factorization.

21114132144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8977122 (or 8977109 counting only the distinct ones).

The product of its digits is 768, while the sum is 24.

Adding to 21114132144 its reverse (44123141112), we get a palindrome (65237273256).

The spelling of 21114132144 in words is "twenty-one billion, one hundred fourteen million, one hundred thirty-two thousand, one hundred forty-four".