123151738321 has 2 divisors, whose sum is σ = 123151738322. Its totient is φ = 123151738320.

The previous prime is 123151738313. The next prime is 123151738387. The reversal of 123151738321 is 123837151321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86930035921 + 36221702400 = 294839^2 + 190320^2 .

It is a cyclic number.

It is not a de Polignac number, because 123151738321 - 2³ = 123151738313 is a prime.

It is not a weakly prime, because it can be changed into another prime (123151738921) 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 as a sum of consecutive naturals, namely, 61575869160 + 61575869161.

It is an arithmetic number, because the mean of its divisors is an integer number (61575869161).

Almost surely, 2^123151738321 is an apocalyptic number.

It is an amenable number.

123151738321 is a deficient number, since it is larger than the sum of its proper divisors (1).

123151738321 is an equidigital number, since it uses as much as digits as its factorization.

123151738321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 37.

Adding to 123151738321 its reverse (123837151321), we get a palindrome (246988889642).

The spelling of 123151738321 in words is "one hundred twenty-three billion, one hundred fifty-one million, seven hundred thirty-eight thousand, three hundred twenty-one".