211220233423 has 2 divisors, whose sum is σ = 211220233424. Its totient is φ = 211220233422.

The previous prime is 211220233403. The next prime is 211220233447. The reversal of 211220233423 is 324332022112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211220233423 - 2²⁹ = 210683362511 is a prime.

It is a super-2 number, since 2×211220233423² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211220233403) 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, 105610116711 + 105610116712.

It is an arithmetic number, because the mean of its divisors is an integer number (105610116712).

Almost surely, 2^211220233423 is an apocalyptic number.

211220233423 is a deficient number, since it is larger than the sum of its proper divisors (1).

211220233423 is an equidigital number, since it uses as much as digits as its factorization.

211220233423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 211220233423 its reverse (324332022112), we get a palindrome (535552255535).

The spelling of 211220233423 in words is "two hundred eleven billion, two hundred twenty million, two hundred thirty-three thousand, four hundred twenty-three".