21241173568885 has 16 divisors (see below), whose sum is σ = 25661496781440. Its totient is φ = 16878242001600.

The previous prime is 21241173568871. The next prime is 21241173568903. The reversal of 21241173568885 is 58886537114212.

It is not a de Polignac number, because 21241173568885 - 2¹³ = 21241173560693 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4114114 + ... + 7707676.

It is an arithmetic number, because the mean of its divisors is an integer number (1603843548840).

Almost surely, 2^{21241173568885} is an apocalyptic number.

It is an amenable number.

21241173568885 is a deficient number, since it is larger than the sum of its proper divisors (4420323212555).

21241173568885 is a wasteful number, since it uses less digits than its factorization.

21241173568885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3601548.

The product of its digits is 25804800, while the sum is 61.

The spelling of 21241173568885 in words is "twenty-one trillion, two hundred forty-one billion, one hundred seventy-three million, five hundred sixty-eight thousand, eight hundred eighty-five".