123240311211 has 16 divisors (see below), whose sum is σ = 172978588800. Its totient is φ = 77831607168.

The previous prime is 123240311203. The next prime is 123240311237. The reversal of 123240311211 is 112113042321.

It is not a de Polignac number, because 123240311211 - 2³ = 123240311203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123240311611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1182160 + ... + 1282178.

It is an arithmetic number, because the mean of its divisors is an integer number (10811161800).

Almost surely, 2^123240311211 is an apocalyptic number.

123240311211 is a deficient number, since it is larger than the sum of its proper divisors (49738277589).

123240311211 is a wasteful number, since it uses less digits than its factorization.

123240311211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121658.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 123240311211 its reverse (112113042321), we get a palindrome (235353353532).

The spelling of 123240311211 in words is "one hundred twenty-three billion, two hundred forty million, three hundred eleven thousand, two hundred eleven".