21200116152305 has 16 divisors (see below), whose sum is σ = 26614474698240. Its totient is φ = 16180993950528.

The previous prime is 21200116152287. The next prime is 21200116152307. The reversal of 21200116152305 is 50325161100212.

It is a cyclic number.

It is not a de Polignac number, because 21200116152305 - 2⁸ = 21200116152049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21200116152307) 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, 236907497 + ... + 236996966.

It is an arithmetic number, because the mean of its divisors is an integer number (1663404668640).

Almost surely, 2^{21200116152305} is an apocalyptic number.

It is an amenable number.

21200116152305 is a deficient number, since it is larger than the sum of its proper divisors (5414358545935).

21200116152305 is a wasteful number, since it uses less digits than its factorization.

21200116152305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473904880.

The product of its (nonzero) digits is 3600, while the sum is 29.

Adding to 21200116152305 its reverse (50325161100212), we get a palindrome (71525277252517).

The spelling of 21200116152305 in words is "twenty-one trillion, two hundred billion, one hundred sixteen million, one hundred fifty-two thousand, three hundred five".