21116232313 has 16 divisors (see below), whose sum is σ = 23141820096. Its totient is φ = 19108477440.

The previous prime is 21116232301. The next prime is 21116232317. The reversal of 21116232313 is 31323261112.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21116232313 - 2¹⁷ = 21116101241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21116232317) 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, 2705745 + ... + 2713537.

It is an arithmetic number, because the mean of its divisors is an integer number (1446363756).

Almost surely, 2^21116232313 is an apocalyptic number.

It is an amenable number.

21116232313 is a deficient number, since it is larger than the sum of its proper divisors (2025587783).

21116232313 is a wasteful number, since it uses less digits than its factorization.

21116232313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8904.

The product of its digits is 1296, while the sum is 25.

Adding to 21116232313 its reverse (31323261112), we get a palindrome (52439493425).

The spelling of 21116232313 in words is "twenty-one billion, one hundred sixteen million, two hundred thirty-two thousand, three hundred thirteen".