21201444001124 has 48 divisors (see below), whose sum is σ = 39454257911040. Its totient is φ = 9934181537280.

The previous prime is 21201444001123. The next prime is 21201444001181. The reversal of 21201444001124 is 42110044410212.

It is a super-2 number, since 2×21201444001124² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21201444001093 and 21201444001102.

It is not an unprimeable number, because it can be changed into a prime (21201444001123) 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 15 ways as a sum of consecutive naturals, for example, 139382399 + ... + 139534425.

It is an arithmetic number, because the mean of its divisors is an integer number (821963706480).

Almost surely, 2^{21201444001124} is an apocalyptic number.

It is an amenable number.

21201444001124 is a deficient number, since it is larger than the sum of its proper divisors (18252813909916).

21201444001124 is a wasteful number, since it uses less digits than its factorization.

21201444001124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160868 (or 160866 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 26.

Adding to 21201444001124 its reverse (42110044410212), we get a palindrome (63311488411336).

The spelling of 21201444001124 in words is "twenty-one trillion, two hundred one billion, four hundred forty-four million, one thousand, one hundred twenty-four".