21205502301 has 16 divisors (see below), whose sum is σ = 28910053440. Its totient is φ = 13820876160.

The previous prime is 21205502299. The next prime is 21205502333. The reversal of 21205502301 is 10320550212.

It is not a de Polignac number, because 21205502301 - 2¹ = 21205502299 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21205502341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 192631 + ... + 281988.

It is an arithmetic number, because the mean of its divisors is an integer number (1806878340).

Almost surely, 2^21205502301 is an apocalyptic number.

It is an amenable number.

21205502301 is a deficient number, since it is larger than the sum of its proper divisors (7704551139).

21205502301 is a wasteful number, since it uses less digits than its factorization.

21205502301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474956.

The product of its (nonzero) digits is 600, while the sum is 21.

The spelling of 21205502301 in words is "twenty-one billion, two hundred five million, five hundred two thousand, three hundred one".