2311201000123 has 4 divisors (see below), whose sum is σ = 2311406323720. Its totient is φ = 2310995676528.

The previous prime is 2311201000111. The next prime is 2311201000127. The reversal of 2311201000123 is 3210001021132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2311201000123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2311201000097 and 2311201000106.

It is not an unprimeable number, because it can be changed into a prime (2311201000127) 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, 102644913 + ... + 102667426.

It is an arithmetic number, because the mean of its divisors is an integer number (577851580930).

Almost surely, 2^{2311201000123} is an apocalyptic number.

2311201000123 is a deficient number, since it is larger than the sum of its proper divisors (205323597).

2311201000123 is a wasteful number, since it uses less digits than its factorization.

2311201000123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205323596.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 2311201000123 its reverse (3210001021132), we get a palindrome (5521202021255).

The spelling of 2311201000123 in words is "two trillion, three hundred eleven billion, two hundred one million, one hundred twenty-three", and thus it is an aban number.