21301311111323 has 4 divisors (see below), whose sum is σ = 21508119957168. Its totient is φ = 21094502265480.

The previous prime is 21301311111293. The next prime is 21301311111371. The reversal of 21301311111323 is 32311111310312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21301311111323 - 2²⁶ = 21301244002459 is a prime.

It is a super-2 number, since 2×21301311111323² (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 (21301311111523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103404422768 + ... + 103404422973.

It is an arithmetic number, because the mean of its divisors is an integer number (5377029989292).

Almost surely, 2^{21301311111323} is an apocalyptic number.

21301311111323 is a deficient number, since it is larger than the sum of its proper divisors (206808845845).

21301311111323 is a wasteful number, since it uses less digits than its factorization.

21301311111323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206808845844.

The product of its (nonzero) digits is 324, while the sum is 23.

Adding to 21301311111323 its reverse (32311111310312), we get a palindrome (53612422421635).

The spelling of 21301311111323 in words is "twenty-one trillion, three hundred one billion, three hundred eleven million, one hundred eleven thousand, three hundred twenty-three".