123138222351 has 16 divisors (see below), whose sum is σ = 169745046528. Its totient is φ = 79320038400.

The previous prime is 123138222343. The next prime is 123138222353. The reversal of 123138222351 is 153222831321.

It is not a de Polignac number, because 123138222351 - 2³ = 123138222343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123138222353) 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 15 ways as a sum of consecutive naturals, for example, 973201 + ... + 1092426.

It is an arithmetic number, because the mean of its divisors is an integer number (10609065408).

Almost surely, 2^123138222351 is an apocalyptic number.

123138222351 is a deficient number, since it is larger than the sum of its proper divisors (46606824177).

123138222351 is a wasteful number, since it uses less digits than its factorization.

123138222351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2066302.

The product of its digits is 17280, while the sum is 33.

The spelling of 123138222351 in words is "one hundred twenty-three billion, one hundred thirty-eight million, two hundred twenty-two thousand, three hundred fifty-one".