21003141144 has 16 divisors (see below), whose sum is σ = 52507852920. Its totient is φ = 7001047040.

The previous prime is 21003141109. The next prime is 21003141167. The reversal of 21003141144 is 44114130012.

It is a super-2 number, since 2×21003141144² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21003141144.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 437565417 + ... + 437565464.

Almost surely, 2^21003141144 is an apocalyptic number.

21003141144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21003141144 is an abundant number, since it is smaller than the sum of its proper divisors (31504711776).

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

21003141144 is a wasteful number, since it uses less digits than its factorization.

21003141144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 875130890 (or 875130886 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 21003141144 its reverse (44114130012), we get a palindrome (65117271156).

The spelling of 21003141144 in words is "twenty-one billion, three million, one hundred forty-one thousand, one hundred forty-four".