211321330220023 has 4 divisors (see below), whose sum is σ = 211463442750240. Its totient is φ = 211179217689808.

The previous prime is 211321330220017. The next prime is 211321330220171. The reversal of 211321330220023 is 320022033123112.

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 211321330220023 - 2²¹ = 211321328122871 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211321330220023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211321330227023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71056262878 + ... + 71056265851.

It is an arithmetic number, because the mean of its divisors is an integer number (52865860687560).

Almost surely, 2^{211321330220023} is an apocalyptic number.

211321330220023 is a deficient number, since it is larger than the sum of its proper divisors (142112530217).

211321330220023 is a wasteful number, since it uses less digits than its factorization.

211321330220023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142112530216.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 211321330220023 its reverse (320022033123112), we get a palindrome (531343363343135).

The spelling of 211321330220023 in words is "two hundred eleven trillion, three hundred twenty-one billion, three hundred thirty million, two hundred twenty thousand, twenty-three".