21111213113323 has 8 divisors (see below), whose sum is σ = 21171399208848. Its totient is φ = 21051111968544.

The previous prime is 21111213113317. The next prime is 21111213113327. The reversal of 21111213113323 is 32331131211112.

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 21111213113323 - 2¹³ = 21111213105131 is a prime.

It is a super-2 number, since 2×21111213113323² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21111213113327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20739940 + ... + 21734017.

It is an arithmetic number, because the mean of its divisors is an integer number (2646424901106).

Almost surely, 2^{21111213113323} is an apocalyptic number.

21111213113323 is a deficient number, since it is larger than the sum of its proper divisors (60186095525).

21111213113323 is an equidigital number, since it uses as much as digits as its factorization.

21111213113323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42475373.

The product of its digits is 648, while the sum is 25.

Adding to 21111213113323 its reverse (32331131211112), we get a palindrome (53442344324435).

The spelling of 21111213113323 in words is "twenty-one trillion, one hundred eleven billion, two hundred thirteen million, one hundred thirteen thousand, three hundred twenty-three".