123013229981 has 2 divisors, whose sum is σ = 123013229982. Its totient is φ = 123013229980.

The previous prime is 123013229953. The next prime is 123013230007. The reversal of 123013229981 is 189922310321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122944903225 + 68326756 = 350635^2 + 8266^2 .

It is an emirp because it is prime and its reverse (189922310321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123013229981 - 2³⁰ = 121939488157 is a prime.

It is a super-2 number, since 2×123013229981² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123013229951) 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, 61506614990 + 61506614991.

It is an arithmetic number, because the mean of its divisors is an integer number (61506614991).

Almost surely, 2^123013229981 is an apocalyptic number.

It is an amenable number.

123013229981 is a deficient number, since it is larger than the sum of its proper divisors (1).

123013229981 is an equidigital number, since it uses as much as digits as its factorization.

123013229981 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 123013229981 in words is "one hundred twenty-three billion, thirteen million, two hundred twenty-nine thousand, nine hundred eighty-one".