23120443400981 has 2 divisors, whose sum is σ = 23120443400982. Its totient is φ = 23120443400980.

The previous prime is 23120443400959. The next prime is 23120443401017. The reversal of 23120443400981 is 18900434402132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21449217568900 + 1671225832081 = 4631330^2 + 1292759^2 .

It is a cyclic number.

It is not a de Polignac number, because 23120443400981 - 2⁶ = 23120443400917 is a prime.

It is a super-2 number, since 2×23120443400981² (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 (23120443400911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11560221700490 + 11560221700491.

It is an arithmetic number, because the mean of its divisors is an integer number (11560221700491).

Almost surely, 2^{23120443400981} is an apocalyptic number.

It is an amenable number.

23120443400981 is a deficient number, since it is larger than the sum of its proper divisors (1).

23120443400981 is an equidigital number, since it uses as much as digits as its factorization.

23120443400981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 165888, while the sum is 41.

The spelling of 23120443400981 in words is "twenty-three trillion, one hundred twenty billion, four hundred forty-three million, four hundred thousand, nine hundred eighty-one".