201112111133123 has 4 divisors (see below), whose sum is σ = 201112455463728. Its totient is φ = 201111766802520.

The previous prime is 201112111133051. The next prime is 201112111133137. The reversal of 201112111133123 is 321331111211102.

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 201112111133123 - 2¹⁴ = 201112111116739 is a prime.

It is a super-2 number, since 2×201112111133123² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201112111133623) 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, 171287711 + ... + 172457832.

It is an arithmetic number, because the mean of its divisors is an integer number (50278113865932).

Almost surely, 2^{201112111133123} is an apocalyptic number.

201112111133123 is a deficient number, since it is larger than the sum of its proper divisors (344330605).

201112111133123 is an equidigital number, since it uses as much as digits as its factorization.

201112111133123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344330604.

The product of its (nonzero) digits is 216, while the sum is 23.

Adding to 201112111133123 its reverse (321331111211102), we get a palindrome (522443222344225).

The spelling of 201112111133123 in words is "two hundred one trillion, one hundred twelve billion, one hundred eleven million, one hundred thirty-three thousand, one hundred twenty-three".