213122023111 has 4 divisors (see below), whose sum is σ = 213123180424. Its totient is φ = 213120865800.

The previous prime is 213122023099. The next prime is 213122023129. The reversal of 213122023111 is 111320221312.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 213122023111 - 2²⁷ = 212987805383 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 (213122023211) 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, 234000 + ... + 693541.

It is an arithmetic number, because the mean of its divisors is an integer number (53280795106).

Almost surely, 2^213122023111 is an apocalyptic number.

213122023111 is a deficient number, since it is larger than the sum of its proper divisors (1157313).

213122023111 is an equidigital number, since it uses as much as digits as its factorization.

213122023111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1157312.

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

Adding to 213122023111 its reverse (111320221312), we get a palindrome (324442244423).

The spelling of 213122023111 in words is "two hundred thirteen billion, one hundred twenty-two million, twenty-three thousand, one hundred eleven".