21440024150121 has 8 divisors (see below), whose sum is σ = 31762998740960. Its totient is φ = 14293349433396.

The previous prime is 21440024150117. The next prime is 21440024150137. The reversal of 21440024150121 is 12105142004412.

21440024150121 is a `hidden beast` number, since 2 + 1 + 4 + 400 + 241 + 5 + 0 + 12 + 1 = 666.

It is not a de Polignac number, because 21440024150121 - 2² = 21440024150117 is a prime.

It is a super-3 number, since 3×21440024150121³ (a number of 41 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 794074968523 = 21440024150121 / (2 + 1 + 4 + 4 + 0 + 0 + 2 + 4 + 1 + 5 + 0 + 1 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21440024150141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 397037484235 + ... + 397037484288.

It is an arithmetic number, because the mean of its divisors is an integer number (3970374842620).

Almost surely, 2^{21440024150121} is an apocalyptic number.

It is an amenable number.

21440024150121 is a deficient number, since it is larger than the sum of its proper divisors (10322974590839).

21440024150121 is an equidigital number, since it uses as much as digits as its factorization.

21440024150121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 794074968532 (or 794074968526 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

Adding to 21440024150121 its reverse (12105142004412), we get a palindrome (33545166154533).

The spelling of 21440024150121 in words is "twenty-one trillion, four hundred forty billion, twenty-four million, one hundred fifty thousand, one hundred twenty-one".