21042144124012 has 48 divisors (see below), whose sum is σ = 41018897983392. Its totient is φ = 9364730388480.

The previous prime is 21042144123989. The next prime is 21042144124019.

21042144124012 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×21042144124012² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21042144124019) 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, 23469093 + ... + 24349180.

It is an arithmetic number, because the mean of its divisors is an integer number (854560374654).

Almost surely, 2^{21042144124012} is an apocalyptic number.

21042144124012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21042144124012 is a deficient number, since it is larger than the sum of its proper divisors (19976753859380).

21042144124012 is a wasteful number, since it uses less digits than its factorization.

21042144124012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47818498 (or 47818496 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 28.

It can be divided in two parts, 2104214 and 4124012, that added together give a palindrome (6228226).

The spelling of 21042144124012 in words is "twenty-one trillion, forty-two billion, one hundred forty-four million, one hundred twenty-four thousand, twelve".