21042644624012 has 24 divisors (see below), whose sum is σ = 41152134279312. Its totient is φ = 9331549721600.

The previous prime is 21042644624011. The next prime is 21042644624059.

21042644624012 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×21042644624012² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21042644624011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5832216773 + ... + 5832220380.

It is an arithmetic number, because the mean of its divisors is an integer number (1714672261638).

Almost surely, 2^{21042644624012} is an apocalyptic number.

21042644624012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21042644624012 is a deficient number, since it is larger than the sum of its proper divisors (20109489655300).

21042644624012 is a wasteful number, since it uses less digits than its factorization.

21042644624012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11664437209 (or 11664437207 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 38.

It can be divided in two parts, 2104264 and 4624012, that added together give a palindrome (6728276).

The spelling of 21042644624012 in words is "twenty-one trillion, forty-two billion, six hundred forty-four million, six hundred twenty-four thousand, twelve".