21230512244005 has 32 divisors (see below), whose sum is σ = 26142762804480. Its totient is φ = 16541753157120.

The previous prime is 21230512243979. The next prime is 21230512244027. The reversal of 21230512244005 is 50044221503212.

It is a happy number.

It is not a de Polignac number, because 21230512244005 - 2⁷ = 21230512243877 is a prime.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 339314854 + ... + 339377416.

It is an arithmetic number, because the mean of its divisors is an integer number (816961337640).

Almost surely, 2^{21230512244005} is an apocalyptic number.

It is an amenable number.

21230512244005 is a deficient number, since it is larger than the sum of its proper divisors (4912250560475).

21230512244005 is a wasteful number, since it uses less digits than its factorization.

21230512244005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65421.

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 21230512244005 its reverse (50044221503212), we get a palindrome (71274733747217).

The spelling of 21230512244005 in words is "twenty-one trillion, two hundred thirty billion, five hundred twelve million, two hundred forty-four thousand, five".