21000412025224 has 32 divisors (see below), whose sum is σ = 39475267120800. Its totient is φ = 10473681137920.

The previous prime is 21000412025221. The next prime is 21000412025231. The reversal of 21000412025224 is 42252021400012.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21000412025221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23736864 + ... + 24605680.

It is an arithmetic number, because the mean of its divisors is an integer number (1233602097525).

Almost surely, 2^{21000412025224} is an apocalyptic number.

It is an amenable number.

21000412025224 is a deficient number, since it is larger than the sum of its proper divisors (18474855095576).

21000412025224 is a wasteful number, since it uses less digits than its factorization.

21000412025224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876453 (or 876449 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

Adding to 21000412025224 its reverse (42252021400012), we get a palindrome (63252433425236).

The spelling of 21000412025224 in words is "twenty-one trillion, four hundred twelve million, twenty-five thousand, two hundred twenty-four".