21200311002323 has 4 divisors (see below), whose sum is σ = 21200320289448. Its totient is φ = 21200301715200.

The previous prime is 21200311002319. The next prime is 21200311002341. The reversal of 21200311002323 is 32320011300212.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 21200311002323 - 2² = 21200311002319 is a prime.

It is a super-2 number, since 2×21200311002323² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21200311002295 and 21200311002304.

It is not an unprimeable number, because it can be changed into a prime (21200311002383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1418840 + ... + 6664362.

It is an arithmetic number, because the mean of its divisors is an integer number (5300080072362).

Almost surely, 2^{21200311002323} is an apocalyptic number.

21200311002323 is a deficient number, since it is larger than the sum of its proper divisors (9287125).

21200311002323 is an equidigital number, since it uses as much as digits as its factorization.

21200311002323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9287124.

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

Adding to 21200311002323 its reverse (32320011300212), we get a palindrome (53520322302535).

The spelling of 21200311002323 in words is "twenty-one trillion, two hundred billion, three hundred eleven million, two thousand, three hundred twenty-three".