211321011223 has 16 divisors (see below), whose sum is σ = 260541023040. Its totient is φ = 167260893696.

The previous prime is 211321011199. The next prime is 211321011227. The reversal of 211321011223 is 322110123112.

It is a cyclic number.

It is not a de Polignac number, because 211321011223 - 2¹⁷ = 211320880151 is a prime.

It is a super-2 number, since 2×211321011223² (a number of 23 digits) contains 22 as substring.

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 211321011223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211321011227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16746588 + ... + 16759201.

It is an arithmetic number, because the mean of its divisors is an integer number (16283813940).

Almost surely, 2^211321011223 is an apocalyptic number.

211321011223 is a deficient number, since it is larger than the sum of its proper divisors (49220011817).

211321011223 is a wasteful number, since it uses less digits than its factorization.

211321011223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33505866.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 211321011223 its reverse (322110123112), we get a palindrome (533431134335).

The spelling of 211321011223 in words is "two hundred eleven billion, three hundred twenty-one million, eleven thousand, two hundred twenty-three".