17999001121 has 2 divisors, whose sum is σ = 17999001122. Its totient is φ = 17999001120.

The previous prime is 17999001101. The next prime is 17999001143. The reversal of 17999001121 is 12110099971.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11227521600 + 6771479521 = 105960^2 + 82289^2 .

It is a cyclic number.

It is not a de Polignac number, because 17999001121 - 2⁹ = 17999000609 is a prime.

It is not a weakly prime, because it can be changed into another prime (17999001101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8999500560 + 8999500561.

It is an arithmetic number, because the mean of its divisors is an integer number (8999500561).

Almost surely, 2^17999001121 is an apocalyptic number.

It is an amenable number.

17999001121 is a deficient number, since it is larger than the sum of its proper divisors (1).

17999001121 is an equidigital number, since it uses as much as digits as its factorization.

17999001121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10206, while the sum is 40.

The spelling of 17999001121 in words is "seventeen billion, nine hundred ninety-nine million, one thousand, one hundred twenty-one".