211023122311 has 4 divisors (see below), whose sum is σ = 211688810712. Its totient is φ = 210357433912.

The previous prime is 211023122309. The next prime is 211023122341. The reversal of 211023122311 is 113221320112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 211023122311 - 2¹ = 211023122309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211023122341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 332843725 + ... + 332844358.

It is an arithmetic number, because the mean of its divisors is an integer number (52922202678).

Almost surely, 2^211023122311 is an apocalyptic number.

211023122311 is a deficient number, since it is larger than the sum of its proper divisors (665688401).

211023122311 is an equidigital number, since it uses as much as digits as its factorization.

211023122311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665688400.

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

Adding to 211023122311 its reverse (113221320112), we get a palindrome (324244442423).

It can be divided in two parts, 21102 and 3122311, that added together give a palindrome (3143413).

The spelling of 211023122311 in words is "two hundred eleven billion, twenty-three million, one hundred twenty-two thousand, three hundred eleven".