123118211623 has 4 divisors (see below), whose sum is σ = 134310776328. Its totient is φ = 111925646920.

The previous prime is 123118211581. The next prime is 123118211627. The reversal of 123118211623 is 326112811321.

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

It is a cyclic number.

It is not a de Polignac number, because 123118211623 - 2¹³ = 123118203431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123118211627) 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, 5596282336 + ... + 5596282357.

It is an arithmetic number, because the mean of its divisors is an integer number (33577694082).

Almost surely, 2^123118211623 is an apocalyptic number.

123118211623 is a deficient number, since it is larger than the sum of its proper divisors (11192564705).

123118211623 is a wasteful number, since it uses less digits than its factorization.

123118211623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11192564704.

The product of its digits is 3456, while the sum is 31.

The spelling of 123118211623 in words is "one hundred twenty-three billion, one hundred eighteen million, two hundred eleven thousand, six hundred twenty-three".