211103012123 has 4 divisors (see below), whose sum is σ = 211123967040. Its totient is φ = 211082057208.

The previous prime is 211103012053. The next prime is 211103012167. The reversal of 211103012123 is 321210301112.

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 211103012123 - 2¹⁰ = 211103011099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211103012023) 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, 10462340 + ... + 10482497.

It is an arithmetic number, because the mean of its divisors is an integer number (52780991760).

Almost surely, 2^211103012123 is an apocalyptic number.

211103012123 is a deficient number, since it is larger than the sum of its proper divisors (20954917).

211103012123 is a wasteful number, since it uses less digits than its factorization.

211103012123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20954916.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 211103012123 its reverse (321210301112), we get a palindrome (532313313235).

The spelling of 211103012123 in words is "two hundred eleven billion, one hundred three million, twelve thousand, one hundred twenty-three".