121581930163 has 2 divisors, whose sum is σ = 121581930164. Its totient is φ = 121581930162.

The previous prime is 121581930103. The next prime is 121581930193. The reversal of 121581930163 is 361039185121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121581930163 - 2¹⁷ = 121581799091 is a prime.

It is not a weakly prime, because it can be changed into another prime (121581930103) 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, 60790965081 + 60790965082.

It is an arithmetic number, because the mean of its divisors is an integer number (60790965082).

Almost surely, 2^121581930163 is an apocalyptic number.

121581930163 is a deficient number, since it is larger than the sum of its proper divisors (1).

121581930163 is an equidigital number, since it uses as much as digits as its factorization.

121581930163 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 40.

The spelling of 121581930163 in words is "one hundred twenty-one billion, five hundred eighty-one million, nine hundred thirty thousand, one hundred sixty-three".