79900111000001 has 2 divisors, whose sum is σ = 79900111000002. Its totient is φ = 79900111000000.

The previous prime is 79900110999971. The next prime is 79900111000007. The reversal of 79900111000001 is 10000011100997.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78531924606976 + 1368186393025 = 8861824^2 + 1169695^2 .

It is an emirp because it is prime and its reverse (10000011100997) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79900111000001 - 2⁶ = 79900110999937 is a prime.

It is a super-3 number, since 3×79900111000001³ (a number of 43 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (79900111000007) 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, 39950055500000 + 39950055500001.

It is an arithmetic number, because the mean of its divisors is an integer number (39950055500001).

Almost surely, 2^{79900111000001} is an apocalyptic number.

It is an amenable number.

79900111000001 is a deficient number, since it is larger than the sum of its proper divisors (1).

79900111000001 is an equidigital number, since it uses as much as digits as its factorization.

79900111000001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 567, while the sum is 29.

Adding to 79900111000001 its reverse (10000011100997), we get a palindrome (89900122100998).

The spelling of 79900111000001 in words is "seventy-nine trillion, nine hundred billion, one hundred eleven million, one", and thus it is an aban number.