21301139305 has 32 divisors (see below), whose sum is σ = 28291046400. Its totient is φ = 15331680000.

The previous prime is 21301139273. The next prime is 21301139323. The reversal of 21301139305 is 50393110312.

It is not a de Polignac number, because 21301139305 - 2⁵ = 21301139273 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 104680 + ... + 231430.

It is an arithmetic number, because the mean of its divisors is an integer number (884095200).

Almost surely, 2^21301139305 is an apocalyptic number.

It is an amenable number.

21301139305 is a deficient number, since it is larger than the sum of its proper divisors (6989907095).

21301139305 is a wasteful number, since it uses less digits than its factorization.

21301139305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126865.

The product of its (nonzero) digits is 2430, while the sum is 28.

Adding to 21301139305 its reverse (50393110312), we get a palindrome (71694249617).

The spelling of 21301139305 in words is "twenty-one billion, three hundred one million, one hundred thirty-nine thousand, three hundred five".