123102311211 has 48 divisors (see below), whose sum is σ = 195588432000. Its totient is φ = 73990869120.

The previous prime is 123102311179. The next prime is 123102311219. The reversal of 123102311211 is 112113201321.

123102311211 is a `hidden beast` number, since 1 + 2 + 310 + 231 + 121 + 1 = 666.

It is not a de Polignac number, because 123102311211 - 2⁵ = 123102311179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123102311219) 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 47 ways as a sum of consecutive naturals, for example, 6707095 + ... + 6725423.

It is an arithmetic number, because the mean of its divisors is an integer number (4074759000).

Almost surely, 2^123102311211 is an apocalyptic number.

123102311211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

123102311211 is a deficient number, since it is larger than the sum of its proper divisors (72486120789).

123102311211 is a wasteful number, since it uses less digits than its factorization.

123102311211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18904 (or 18901 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 123102311211 its reverse (112113201321), we get a palindrome (235215512532).

The spelling of 123102311211 in words is "one hundred twenty-three billion, one hundred two million, three hundred eleven thousand, two hundred eleven".