211321123115 has 4 divisors (see below), whose sum is σ = 253585347744. Its totient is φ = 169056898488.

The previous prime is 211321123103. The next prime is 211321123177. The reversal of 211321123115 is 511321123112.

211321123115 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 211321123115 - 2²⁴ = 211304345899 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21132112307 + ... + 21132112316.

It is an arithmetic number, because the mean of its divisors is an integer number (63396336936).

Almost surely, 2^211321123115 is an apocalyptic number.

211321123115 is a deficient number, since it is larger than the sum of its proper divisors (42264224629).

211321123115 is an equidigital number, since it uses as much as digits as its factorization.

211321123115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42264224628.

The product of its digits is 360, while the sum is 23.

Adding to 211321123115 its reverse (511321123112), we get a palindrome (722642246227).

The spelling of 211321123115 in words is "two hundred eleven billion, three hundred twenty-one million, one hundred twenty-three thousand, one hundred fifteen".