21144411002 has 48 divisors (see below), whose sum is σ = 37509700320. Its totient is φ = 8861486400.

The previous prime is 21144410983. The next prime is 21144411007. The reversal of 21144411002 is 20011444112.

It is a super-2 number, since 2×21144411002² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21144411007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3785852 + ... + 3791432.

It is an arithmetic number, because the mean of its divisors is an integer number (781452090).

Almost surely, 2^21144411002 is an apocalyptic number.

21144411002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21144411002 is a deficient number, since it is larger than the sum of its proper divisors (16365289318).

21144411002 is a wasteful number, since it uses less digits than its factorization.

21144411002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6639 (or 6626 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21144411002 its reverse (20011444112), we get a palindrome (41155855114).

The spelling of 21144411002 in words is "twenty-one billion, one hundred forty-four million, four hundred eleven thousand, two".