21000220211323 has 2 divisors, whose sum is σ = 21000220211324. Its totient is φ = 21000220211322.

The previous prime is 21000220211293. The next prime is 21000220211353. The reversal of 21000220211323 is 32311202200012.

It is a balanced prime because it is at equal distance from previous prime (21000220211293) and next prime (21000220211353).

It is a cyclic number.

It is not a de Polignac number, because 21000220211323 - 2¹⁷ = 21000220080251 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21000220211323.

It is not a weakly prime, because it can be changed into another prime (21000220211353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500110105661 + 10500110105662.

It is an arithmetic number, because the mean of its divisors is an integer number (10500110105662).

Almost surely, 2^{21000220211323} is an apocalyptic number.

21000220211323 is a deficient number, since it is larger than the sum of its proper divisors (1).

21000220211323 is an equidigital number, since it uses as much as digits as its factorization.

21000220211323 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21000220211323 its reverse (32311202200012), we get a palindrome (53311422411335).

The spelling of 21000220211323 in words is "twenty-one trillion, two hundred twenty million, two hundred eleven thousand, three hundred twenty-three".