21244101043144 has 32 divisors (see below), whose sum is σ = 45523255432320. Its totient is φ = 9104578379136.

The previous prime is 21244101043141. The next prime is 21244101043169. The reversal of 21244101043144 is 44134010144212.

It is not an unprimeable number, because it can be changed into a prime (21244101043141) 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 7 ways as a sum of consecutive naturals, for example, 17132397 + ... + 18330499.

It is an arithmetic number, because the mean of its divisors is an integer number (1422601732260).

Almost surely, 2^{21244101043144} is an apocalyptic number.

It is an amenable number.

21244101043144 is an abundant number, since it is smaller than the sum of its proper divisors (24279154389176).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21244101043144 is a wasteful number, since it uses less digits than its factorization.

21244101043144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1514749 (or 1514745 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 31.

Adding to 21244101043144 its reverse (44134010144212), we get a palindrome (65378111187356).

The spelling of 21244101043144 in words is "twenty-one trillion, two hundred forty-four billion, one hundred one million, forty-three thousand, one hundred forty-four".