21311312220023 has 8 divisors (see below), whose sum is σ = 24359410360320. Its totient is φ = 18264120321240.

The previous prime is 21311312220013. The next prime is 21311312220031. The reversal of 21311312220023 is 32002221311312.

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 21311312220023 - 2¹² = 21311312215927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21311312220013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 226509983 + ... + 226604048.

It is an arithmetic number, because the mean of its divisors is an integer number (3044926295040).

Almost surely, 2^{21311312220023} is an apocalyptic number.

21311312220023 is a deficient number, since it is larger than the sum of its proper divisors (3048098140297).

21311312220023 is an equidigital number, since it uses as much as digits as its factorization.

21311312220023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453120757.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 21311312220023 its reverse (32002221311312), we get a palindrome (53313533531335).

The spelling of 21311312220023 in words is "twenty-one trillion, three hundred eleven billion, three hundred twelve million, two hundred twenty thousand, twenty-three".