21312211021323 has 8 divisors (see below), whose sum is σ = 29184288966288. Its totient is φ = 13824136878624.

The previous prime is 21312211021319. The next prime is 21312211021417. The reversal of 21312211021323 is 32312011221312.

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

It is not a de Polignac number, because 21312211021323 - 2² = 21312211021319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21312211021293 and 21312211021302.

It is not an unprimeable number, because it can be changed into a prime (21312211021223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96000950436 + ... + 96000950657.

It is an arithmetic number, because the mean of its divisors is an integer number (3648036120786).

Almost surely, 2^{21312211021323} is an apocalyptic number.

21312211021323 is a deficient number, since it is larger than the sum of its proper divisors (7872077944965).

21312211021323 is a wasteful number, since it uses less digits than its factorization.

21312211021323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192001901133.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 21312211021323 its reverse (32312011221312), we get a palindrome (53624222242635).

The spelling of 21312211021323 in words is "twenty-one trillion, three hundred twelve billion, two hundred eleven million, twenty-one thousand, three hundred twenty-three".