123242056351 has 4 divisors (see below), whose sum is σ = 123630832872. Its totient is φ = 122853279832.

The previous prime is 123242056283. The next prime is 123242056369. The reversal of 123242056351 is 153650242321.

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 123242056351 - 2¹¹ = 123242054303 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 (123242056391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194387785 + ... + 194388418.

It is an arithmetic number, because the mean of its divisors is an integer number (30907708218).

Almost surely, 2^123242056351 is an apocalyptic number.

123242056351 is a deficient number, since it is larger than the sum of its proper divisors (388776521).

123242056351 is an equidigital number, since it uses as much as digits as its factorization.

123242056351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388776520.

The product of its (nonzero) digits is 43200, while the sum is 34.

Adding to 123242056351 its reverse (153650242321), we get a palindrome (276892298672).

The spelling of 123242056351 in words is "one hundred twenty-three billion, two hundred forty-two million, fifty-six thousand, three hundred fifty-one".