21024412404403 has 2 divisors, whose sum is σ = 21024412404404. Its totient is φ = 21024412404402.

The previous prime is 21024412404379. The next prime is 21024412404421. The reversal of 21024412404403 is 30440421442012.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21024412404403 - 2⁵ = 21024412404371 is a prime.

It is a super-2 number, since 2×21024412404403² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21027412404403) 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 as a sum of consecutive naturals, namely, 10512206202201 + 10512206202202.

It is an arithmetic number, because the mean of its divisors is an integer number (10512206202202).

Almost surely, 2^{21024412404403} is an apocalyptic number.

21024412404403 is a deficient number, since it is larger than the sum of its proper divisors (1).

21024412404403 is an equidigital number, since it uses as much as digits as its factorization.

21024412404403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24576, while the sum is 31.

Adding to 21024412404403 its reverse (30440421442012), we get a palindrome (51464833846415).

The spelling of 21024412404403 in words is "twenty-one trillion, twenty-four billion, four hundred twelve million, four hundred four thousand, four hundred three".