21114102144 has 32 divisors (see below), whose sum is σ = 56084334840. Its totient is φ = 7038033920.

The previous prime is 21114102137. The next prime is 21114102157. The reversal of 21114102144 is 44120141112.

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 21114102144.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27491937 + ... + 27492704.

Almost surely, 2^21114102144 is an apocalyptic number.

21114102144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21114102144 is an abundant number, since it is smaller than the sum of its proper divisors (34970232696).

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

21114102144 is an equidigital number, since it uses as much as digits as its factorization.

21114102144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54984658 (or 54984646 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 21114102144 its reverse (44120141112), we get a palindrome (65234243256).

The spelling of 21114102144 in words is "twenty-one billion, one hundred fourteen million, one hundred two thousand, one hundred forty-four".