21113161102345 has 8 divisors (see below), whose sum is σ = 27284700501576. Its totient is φ = 15591257429376.

The previous prime is 21113161102339. The next prime is 21113161102357. The reversal of 21113161102345 is 54320116131112.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 342865289209 + 20770295813136 = 585547^2 + 4557444^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21113161102345 - 2⁷ = 21113161102217 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162408931492 + ... + 162408931621.

It is an arithmetic number, because the mean of its divisors is an integer number (3410587562697).

Almost surely, 2^{21113161102345} is an apocalyptic number.

It is an amenable number.

21113161102345 is a deficient number, since it is larger than the sum of its proper divisors (6171539399231).

21113161102345 is a wasteful number, since it uses less digits than its factorization.

21113161102345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324817863131.

The product of its (nonzero) digits is 4320, while the sum is 31.

Adding to 21113161102345 its reverse (54320116131112), we get a palindrome (75433277233457).

The spelling of 21113161102345 in words is "twenty-one trillion, one hundred thirteen billion, one hundred sixty-one million, one hundred two thousand, three hundred forty-five".