21331312122303 has 6 divisors (see below), whose sum is σ = 30811895287784. Its totient is φ = 14220874748196.

The previous prime is 21331312122301. The next prime is 21331312122331. The reversal of 21331312122303 is 30322121313312.

21331312122303 is a `hidden beast` number, since 2 + 1 + 3 + 31 + 312 + 12 + 2 + 303 = 666.

It is not a de Polignac number, because 21331312122303 - 2¹ = 21331312122301 is a prime.

It is a super-2 number, since 2×21331312122303² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21331312122301) 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 5 ways as a sum of consecutive naturals, for example, 1185072895675 + ... + 1185072895692.

Almost surely, 2^{21331312122303} is an apocalyptic number.

21331312122303 is a deficient number, since it is larger than the sum of its proper divisors (9480583165481).

21331312122303 is a wasteful number, since it uses less digits than its factorization.

21331312122303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2370145791373 (or 2370145791370 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

Adding to 21331312122303 its reverse (30322121313312), we get a palindrome (51653433435615).

The spelling of 21331312122303 in words is "twenty-one trillion, three hundred thirty-one billion, three hundred twelve million, one hundred twenty-two thousand, three hundred three".