211210311111123 has 8 divisors (see below), whose sum is σ = 281748944387008. Its totient is φ = 140739275954664.

The previous prime is 211210311111077. The next prime is 211210311111139. The reversal of 211210311111123 is 321111113012112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 211210311111123 - 2²¹ = 211210309013971 is a prime.

It is a super-2 number, since 2×211210311111123² (a number of 29 digits) contains 22 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 211210311111123.

It is not an unprimeable number, because it can be changed into a prime (211210311151123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16899522565 + ... + 16899535062.

It is an arithmetic number, because the mean of its divisors is an integer number (35218618048376).

Almost surely, 2^{211210311111123} is an apocalyptic number.

211210311111123 is a deficient number, since it is larger than the sum of its proper divisors (70538633275885).

211210311111123 is a wasteful number, since it uses less digits than its factorization.

211210311111123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33799059713.

The product of its (nonzero) digits is 72, while the sum is 21.

Adding to 211210311111123 its reverse (321111113012112), we get a palindrome (532321424123235).

The spelling of 211210311111123 in words is "two hundred eleven trillion, two hundred ten billion, three hundred eleven million, one hundred eleven thousand, one hundred twenty-three".