123120103311 has 6 divisors (see below), whose sum is σ = 177840149240. Its totient is φ = 82080068868.

The previous prime is 123120103307. The next prime is 123120103339. The reversal of 123120103311 is 113301021321.

123120103311 is a `hidden beast` number, since 1 + 231 + 20 + 103 + 311 = 666.

It is not a de Polignac number, because 123120103311 - 2² = 123120103307 is a prime.

It is a super-2 number, since 2×123120103311² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123120103111) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6840005731 + ... + 6840005748.

Almost surely, 2^123120103311 is an apocalyptic number.

123120103311 is a deficient number, since it is larger than the sum of its proper divisors (54720045929).

123120103311 is a wasteful number, since it uses less digits than its factorization.

123120103311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13680011485 (or 13680011482 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 123120103311 its reverse (113301021321), we get a palindrome (236421124632).

The spelling of 123120103311 in words is "one hundred twenty-three billion, one hundred twenty million, one hundred three thousand, three hundred eleven".