23120203129981 has 2 divisors, whose sum is σ = 23120203129982. Its totient is φ = 23120203129980.

The previous prime is 23120203129973. The next prime is 23120203130111. The reversal of 23120203129981 is 18992130202132.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21479841583225 + 1640361546756 = 4634635^2 + 1280766^2 .

It is a cyclic number.

It is not a de Polignac number, because 23120203129981 - 2³ = 23120203129973 is a prime.

It is a super-2 number, since 2×23120203129981² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23120203109981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11560101564990 + 11560101564991.

It is an arithmetic number, because the mean of its divisors is an integer number (11560101564991).

Almost surely, 2^{23120203129981} is an apocalyptic number.

It is an amenable number.

23120203129981 is a deficient number, since it is larger than the sum of its proper divisors (1).

23120203129981 is an equidigital number, since it uses as much as digits as its factorization.

23120203129981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 43.

The spelling of 23120203129981 in words is "twenty-three trillion, one hundred twenty billion, two hundred three million, one hundred twenty-nine thousand, nine hundred eighty-one".