211123023111 has 192 divisors, whose sum is σ = 419839580160. Its totient is φ = 98701701120.

The previous prime is 211123023101. The next prime is 211123023113. The reversal of 211123023111 is 111320321112.

It is not a de Polignac number, because 211123023111 - 2⁹ = 211123022599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211123023113) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 58529670 + ... + 58533276.

It is an arithmetic number, because the mean of its divisors is an integer number (2186664480).

Almost surely, 2^211123023111 is an apocalyptic number.

211123023111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

211123023111 is a deficient number, since it is larger than the sum of its proper divisors (208716557049).

211123023111 is a wasteful number, since it uses less digits than its factorization.

211123023111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3806 (or 3803 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 211123023111 its reverse (111320321112), we get a palindrome (322443344223).

The spelling of 211123023111 in words is "two hundred eleven billion, one hundred twenty-three million, twenty-three thousand, one hundred eleven".