211021211211223 has 16 divisors (see below), whose sum is σ = 241237631289600. Its totient is φ = 180822428652096.

The previous prime is 211021211211191. The next prime is 211021211211229. The reversal of 211021211211223 is 322112112120112.

It is not a de Polignac number, because 211021211211223 - 2⁵ = 211021211211191 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211021211211194 and 211021211211203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211021211211229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 630418740 + ... + 630753382.

It is an arithmetic number, because the mean of its divisors is an integer number (15077351955600).

Almost surely, 2^{211021211211223} is an apocalyptic number.

211021211211223 is a deficient number, since it is larger than the sum of its proper divisors (30216420078377).

211021211211223 is a wasteful number, since it uses less digits than its factorization.

211021211211223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360726.

The product of its (nonzero) digits is 192, while the sum is 22.

Adding to 211021211211223 its reverse (322112112120112), we get a palindrome (533133323331335).

The spelling of 211021211211223 in words is "two hundred eleven trillion, twenty-one billion, two hundred eleven million, two hundred eleven thousand, two hundred twenty-three".