211102111123 has 4 divisors (see below), whose sum is σ = 211104334960. Its totient is φ = 211099887288.

The previous prime is 211102111109. The next prime is 211102111127. The reversal of 211102111123 is 321111201112.

It is a happy number.

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 211102111123 - 2³⁷ = 73663157651 is a prime.

It is a super-2 number, since 2×211102111123² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211102111097 and 211102111106.

It is not an unprimeable number, because it can be changed into a prime (211102111127) 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, 962868 + ... + 1161601.

It is an arithmetic number, because the mean of its divisors is an integer number (52776083740).

Almost surely, 2^211102111123 is an apocalyptic number.

211102111123 is a deficient number, since it is larger than the sum of its proper divisors (2223837).

211102111123 is an equidigital number, since it uses as much as digits as its factorization.

211102111123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2223836.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 211102111123 its reverse (321111201112), we get a palindrome (532213312235).

The spelling of 211102111123 in words is "two hundred eleven billion, one hundred two million, one hundred eleven thousand, one hundred twenty-three".