21144021130 has 64 divisors (see below), whose sum is σ = 39327482880. Its totient is φ = 8180640000.

The previous prime is 21144021109. The next prime is 21144021137. The reversal of 21144021130 is 3112044112.

It is a junction number, because it is equal to n+sod(n) for n = 21144021098 and 21144021107.

It is not an unprimeable number, because it can be changed into a prime (21144021137) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 16251480 + ... + 16252780.

It is an arithmetic number, because the mean of its divisors is an integer number (614491920).

Almost surely, 2^21144021130 is an apocalyptic number.

21144021130 is a deficient number, since it is larger than the sum of its proper divisors (18183461750).

21144021130 is a wasteful number, since it uses less digits than its factorization.

21144021130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1735.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21144021130 its reverse (3112044112), we get a palindrome (24256065242).

The spelling of 21144021130 in words is "twenty-one billion, one hundred forty-four million, twenty-one thousand, one hundred thirty".