138225604123 has 2 divisors, whose sum is σ = 138225604124. Its totient is φ = 138225604122.

The previous prime is 138225604109. The next prime is 138225604129. The reversal of 138225604123 is 321406522831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 138225604123 - 2¹⁷ = 138225473051 is a prime.

It is not a weakly prime, because it can be changed into another prime (138225604129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69112802061 + 69112802062.

It is an arithmetic number, because the mean of its divisors is an integer number (69112802062).

Almost surely, 2^138225604123 is an apocalyptic number.

138225604123 is a deficient number, since it is larger than the sum of its proper divisors (1).

138225604123 is an equidigital number, since it uses as much as digits as its factorization.

138225604123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 37.

The spelling of 138225604123 in words is "one hundred thirty-eight billion, two hundred twenty-five million, six hundred four thousand, one hundred twenty-three".