211312111123 has 8 divisors (see below), whose sum is σ = 211805020160. Its totient is φ = 210819679560.

The previous prime is 211312111117. The next prime is 211312111151. The reversal of 211312111123 is 321111213112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211312111123 is a prime.

It is a super-2 number, since 2×211312111123² (a number of 23 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 211312111123.

It is not an unprimeable number, because it can be changed into a prime (211312111163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 774568 + ... + 1011226.

It is an arithmetic number, because the mean of its divisors is an integer number (26475627520).

Almost surely, 2^211312111123 is an apocalyptic number.

211312111123 is a deficient number, since it is larger than the sum of its proper divisors (492909037).

211312111123 is a wasteful number, since it uses less digits than its factorization.

211312111123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238737.

The product of its digits is 72, while the sum is 19.

Adding to 211312111123 its reverse (321111213112), we get a palindrome (532423324235).

The spelling of 211312111123 in words is "two hundred eleven billion, three hundred twelve million, one hundred eleven thousand, one hundred twenty-three".