123120232011 has 16 divisors (see below), whose sum is σ = 208457536000. Its totient is φ = 70354418184.

The previous prime is 123120232003. The next prime is 123120232093. The reversal of 123120232011 is 110232021321.

It is not a de Polignac number, because 123120232011 - 2³ = 123120232003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123120232111) 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, 325714711 + ... + 325715088.

It is an arithmetic number, because the mean of its divisors is an integer number (13028596000).

Almost surely, 2^123120232011 is an apocalyptic number.

123120232011 is a deficient number, since it is larger than the sum of its proper divisors (85337303989).

123120232011 is an equidigital number, since it uses as much as digits as its factorization.

123120232011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651429815 (or 651429809 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 123120232011 its reverse (110232021321), we get a palindrome (233352253332).

The spelling of 123120232011 in words is "one hundred twenty-three billion, one hundred twenty million, two hundred thirty-two thousand, eleven".