123011200111 has 4 divisors (see below), whose sum is σ = 125027777224. Its totient is φ = 120994623000.

The previous prime is 123011200097. The next prime is 123011200139. The reversal of 123011200111 is 111002110321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111002110321 = 397 ⋅279602293.

It is a cyclic number.

It is not a de Polignac number, because 123011200111 - 2¹⁷ = 123011069039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123011200091 and 123011200100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123011500111) 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 3 ways as a sum of consecutive naturals, for example, 1008288465 + ... + 1008288586.

It is an arithmetic number, because the mean of its divisors is an integer number (31256944306).

Almost surely, 2^123011200111 is an apocalyptic number.

123011200111 is a deficient number, since it is larger than the sum of its proper divisors (2016577113).

123011200111 is an equidigital number, since it uses as much as digits as its factorization.

123011200111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2016577112.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 123011200111 its reverse (111002110321), we get a palindrome (234013310432).

The spelling of 123011200111 in words is "one hundred twenty-three billion, eleven million, two hundred thousand, one hundred eleven".