23120001299981 has 2 divisors, whose sum is σ = 23120001299982. Its totient is φ = 23120001299980.

The previous prime is 23120001299953. The next prime is 23120001300001. The reversal of 23120001299981 is 18999210002132.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19479953232100 + 3640048067881 = 4413610^2 + 1907891^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23120001299981 is a prime.

It is a super-2 number, since 2×23120001299981² (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 (23120001299951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11560000649990 + 11560000649991.

It is an arithmetic number, because the mean of its divisors is an integer number (11560000649991).

Almost surely, 2^{23120001299981} is an apocalyptic number.

It is an amenable number.

23120001299981 is a deficient number, since it is larger than the sum of its proper divisors (1).

23120001299981 is an equidigital number, since it uses as much as digits as its factorization.

23120001299981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139968, while the sum is 47.

The spelling of 23120001299981 in words is "twenty-three trillion, one hundred twenty billion, one million, two hundred ninety-nine thousand, nine hundred eighty-one".