21041431310305 has 16 divisors (see below), whose sum is σ = 28923464029824. Its totient is φ = 14395088067840.

The previous prime is 21041431310261. The next prime is 21041431310353. The reversal of 21041431310305 is 50301313414012.

It is not a de Polignac number, because 21041431310305 - 2³³ = 21032841375713 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 694192411 + ... + 694222720.

It is an arithmetic number, because the mean of its divisors is an integer number (1807716501864).

Almost surely, 2^{21041431310305} is an apocalyptic number.

It is an amenable number.

21041431310305 is a deficient number, since it is larger than the sum of its proper divisors (7882032719519).

21041431310305 is a wasteful number, since it uses less digits than its factorization.

21041431310305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1388415576.

The product of its (nonzero) digits is 4320, while the sum is 28.

Adding to 21041431310305 its reverse (50301313414012), we get a palindrome (71342744724317).

The spelling of 21041431310305 in words is "twenty-one trillion, forty-one billion, four hundred thirty-one million, three hundred ten thousand, three hundred five".