211011203123 has 16 divisors (see below), whose sum is σ = 242546088960. Its totient is φ = 179824286400.

The previous prime is 211011203113. The next prime is 211011203129. The reversal of 211011203123 is 321302110112.

It is a cyclic number.

It is not a de Polignac number, because 211011203123 - 2¹⁶ = 211011137587 is a prime.

It is not an unprimeable number, because it can be changed into a prime (211011203129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9362438 + ... + 9384948.

It is an arithmetic number, because the mean of its divisors is an integer number (15159130560).

Almost surely, 2^211011203123 is an apocalyptic number.

211011203123 is a deficient number, since it is larger than the sum of its proper divisors (31534885837).

211011203123 is a wasteful number, since it uses less digits than its factorization.

211011203123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30178.

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

Adding to 211011203123 its reverse (321302110112), we get a palindrome (532313313235).

The spelling of 211011203123 in words is "two hundred eleven billion, eleven million, two hundred three thousand, one hundred twenty-three".