21113161220303 has 4 divisors (see below), whose sum is σ = 21113442305928. Its totient is φ = 21112880134680.

The previous prime is 21113161220269. The next prime is 21113161220317. The reversal of 21113161220303 is 30302216131112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21113161220303 - 2¹⁴ = 21113161203919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21113161280303) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 140430113 + ... + 140580378.

It is an arithmetic number, because the mean of its divisors is an integer number (5278360576482).

Almost surely, 2^{21113161220303} is an apocalyptic number.

21113161220303 is a deficient number, since it is larger than the sum of its proper divisors (281085625).

21113161220303 is an equidigital number, since it uses as much as digits as its factorization.

21113161220303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281085624.

The product of its (nonzero) digits is 1296, while the sum is 26.

Adding to 21113161220303 its reverse (30302216131112), we get a palindrome (51415377351415).

The spelling of 21113161220303 in words is "twenty-one trillion, one hundred thirteen billion, one hundred sixty-one million, two hundred twenty thousand, three hundred three".