118521961001 has 2 divisors, whose sum is σ = 118521961002. Its totient is φ = 118521961000.

The previous prime is 118521960979. The next prime is 118521961067. The reversal of 118521961001 is 100169125811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82770714601 + 35751246400 = 287699^2 + 189080^2 .

It is a cyclic number.

It is not a de Polignac number, because 118521961001 - 2²⁶ = 118454852137 is a prime.

It is not a weakly prime, because it can be changed into another prime (118521960001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59260980500 + 59260980501.

It is an arithmetic number, because the mean of its divisors is an integer number (59260980501).

Almost surely, 2^118521961001 is an apocalyptic number.

It is an amenable number.

118521961001 is a deficient number, since it is larger than the sum of its proper divisors (1).

118521961001 is an equidigital number, since it uses as much as digits as its factorization.

118521961001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 35.

The spelling of 118521961001 in words is "one hundred eighteen billion, five hundred twenty-one million, nine hundred sixty-one thousand, one".