211311313103123 has 4 divisors (see below), whose sum is σ = 214465213298760. Its totient is φ = 208157412907488.

The previous prime is 211311313103119. The next prime is 211311313103129. The reversal of 211311313103123 is 321301313113112.

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 211311313103123 - 2² = 211311313103119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211311313103092 and 211311313103101.

It is not an unprimeable number, because it can be changed into a prime (211311313103129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1576950097718 + ... + 1576950097851.

It is an arithmetic number, because the mean of its divisors is an integer number (53616303324690).

Almost surely, 2^{211311313103123} is an apocalyptic number.

211311313103123 is a deficient number, since it is larger than the sum of its proper divisors (3153900195637).

211311313103123 is an equidigital number, since it uses as much as digits as its factorization.

211311313103123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3153900195636.

The product of its (nonzero) digits is 972, while the sum is 26.

Adding to 211311313103123 its reverse (321301313113112), we get a palindrome (532612626216235).

The spelling of 211311313103123 in words is "two hundred eleven trillion, three hundred eleven billion, three hundred thirteen million, one hundred three thousand, one hundred twenty-three".