21042114205 has 48 divisors (see below), whose sum is σ = 31507297920. Its totient is φ = 13197873024.

The previous prime is 21042114173. The next prime is 21042114221. The reversal of 21042114205 is 50241124012.

It is not a de Polignac number, because 21042114205 - 2⁵ = 21042114173 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 47 ways as a sum of consecutive naturals, for example, 337702 + ... + 395128.

It is an arithmetic number, because the mean of its divisors is an integer number (656402040).

Almost surely, 2^21042114205 is an apocalyptic number.

It is an amenable number.

21042114205 is a deficient number, since it is larger than the sum of its proper divisors (10465183715).

21042114205 is a wasteful number, since it uses less digits than its factorization.

21042114205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57506 (or 57487 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

Adding to 21042114205 its reverse (50241124012), we get a palindrome (71283238217).

The spelling of 21042114205 in words is "twenty-one billion, forty-two million, one hundred fourteen thousand, two hundred five".