211111102210123 has 4 divisors (see below), whose sum is σ = 211149465127168. Its totient is φ = 211072739293080.

The previous prime is 211111102210121. The next prime is 211111102210147. The reversal of 211111102210123 is 321012201111112.

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 211111102210123 - 2¹ = 211111102210121 is a prime.

It is a super-3 number, since 3×211111102210123³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211111102210123.

It is not an unprimeable number, because it can be changed into a prime (211111102210121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19181450268 + ... + 19181461273.

It is an arithmetic number, because the mean of its divisors is an integer number (52787366281792).

Almost surely, 2^{211111102210123} is an apocalyptic number.

211111102210123 is a deficient number, since it is larger than the sum of its proper divisors (38362917045).

211111102210123 is an equidigital number, since it uses as much as digits as its factorization.

211111102210123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38362917044.

The product of its (nonzero) digits is 48, while the sum is 19.

Adding to 211111102210123 its reverse (321012201111112), we get a palindrome (532123303321235).

The spelling of 211111102210123 in words is "two hundred eleven trillion, one hundred eleven billion, one hundred two million, two hundred ten thousand, one hundred twenty-three".