213120021223 has 2 divisors, whose sum is σ = 213120021224. Its totient is φ = 213120021222.

The previous prime is 213120021187. The next prime is 213120021271. The reversal of 213120021223 is 322120021312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213120021223 - 2¹³ = 213120013031 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213120021223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213120028223) 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 as a sum of consecutive naturals, namely, 106560010611 + 106560010612.

It is an arithmetic number, because the mean of its divisors is an integer number (106560010612).

Almost surely, 2^213120021223 is an apocalyptic number.

213120021223 is a deficient number, since it is larger than the sum of its proper divisors (1).

213120021223 is an equidigital number, since it uses as much as digits as its factorization.

213120021223 is an odious number, because the sum of its binary digits is odd.

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

Adding to 213120021223 its reverse (322120021312), we get a palindrome (535240042535).

The spelling of 213120021223 in words is "two hundred thirteen billion, one hundred twenty million, twenty-one thousand, two hundred twenty-three".