123203019136181 has 2 divisors, whose sum is σ = 123203019136182. Its totient is φ = 123203019136180.

The previous prime is 123203019136157. The next prime is 123203019136193. The reversal of 123203019136181 is 181631910302321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64067057556100 + 59135961580081 = 8004190^2 + 7689991^2 .

It is a cyclic number.

It is not a de Polignac number, because 123203019136181 - 2⁶ = 123203019136117 is a prime.

It is a super-2 number, since 2×123203019136181² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123203019136151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61601509568090 + 61601509568091.

It is an arithmetic number, because the mean of its divisors is an integer number (61601509568091).

Almost surely, 2^{123203019136181} is an apocalyptic number.

It is an amenable number.

123203019136181 is a deficient number, since it is larger than the sum of its proper divisors (1).

123203019136181 is an equidigital number, since it uses as much as digits as its factorization.

123203019136181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 41.

The spelling of 123203019136181 in words is "one hundred twenty-three trillion, two hundred three billion, nineteen million, one hundred thirty-six thousand, one hundred eighty-one".