21301340113455 has 16 divisors (see below), whose sum is σ = 34124272932960. Its totient is φ = 11346671810048.

The previous prime is 21301340113421. The next prime is 21301340113507. The reversal of 21301340113455 is 55431104310312.

It is a cyclic number.

It is not a de Polignac number, because 21301340113455 - 2¹¹ = 21301340111407 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, 877669782 + ... + 877694051.

It is an arithmetic number, because the mean of its divisors is an integer number (2132767058310).

Almost surely, 2^{21301340113455} is an apocalyptic number.

21301340113455 is a deficient number, since it is larger than the sum of its proper divisors (12822932819505).

21301340113455 is a wasteful number, since it uses less digits than its factorization.

21301340113455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1755364650.

The product of its (nonzero) digits is 21600, while the sum is 33.

Adding to 21301340113455 its reverse (55431104310312), we get a palindrome (76732444423767).

The spelling of 21301340113455 in words is "twenty-one trillion, three hundred one billion, three hundred forty million, one hundred thirteen thousand, four hundred fifty-five".