211103505213 has 4 divisors (see below), whose sum is σ = 281471340288. Its totient is φ = 140735670140.

The previous prime is 211103505203. The next prime is 211103505241. The reversal of 211103505213 is 312505301112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 211103505213 - 2¹⁸ = 211103243069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211103505203) 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, 35183917533 + ... + 35183917538.

It is an arithmetic number, because the mean of its divisors is an integer number (70367835072).

Almost surely, 2^211103505213 is an apocalyptic number.

It is an amenable number.

211103505213 is a deficient number, since it is larger than the sum of its proper divisors (70367835075).

211103505213 is an equidigital number, since it uses as much as digits as its factorization.

211103505213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70367835074.

The product of its (nonzero) digits is 900, while the sum is 24.

Adding to 211103505213 its reverse (312505301112), we get a palindrome (523608806325).

The spelling of 211103505213 in words is "two hundred eleven billion, one hundred three million, five hundred five thousand, two hundred thirteen".