21001231202303 has 8 divisors (see below), whose sum is σ = 22911270301440. Its totient is φ = 19091331480280.

The previous prime is 21001231202291. The next prime is 21001231202309. The reversal of 21001231202303 is 30320213210012.

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 21001231202303 - 2¹⁴ = 21001231185919 is a prime.

It is a super-2 number, since 2×21001231202303² (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 (21001231202309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34529093 + ... + 35132046.

It is an arithmetic number, because the mean of its divisors is an integer number (2863908787680).

Almost surely, 2^{21001231202303} is an apocalyptic number.

21001231202303 is a deficient number, since it is larger than the sum of its proper divisors (1910039099137).

21001231202303 is a wasteful number, since it uses less digits than its factorization.

21001231202303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69688557.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21001231202303 its reverse (30320213210012), we get a palindrome (51321444412315).

The spelling of 21001231202303 in words is "twenty-one trillion, one billion, two hundred thirty-one million, two hundred two thousand, three hundred three".