121289085487 has 2 divisors, whose sum is σ = 121289085488. Its totient is φ = 121289085486.

The previous prime is 121289085451. The next prime is 121289085559. The reversal of 121289085487 is 784580982121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121289085487 - 2¹⁵ = 121289052719 is a prime.

It is a super-2 number, since 2×121289085487² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121289085187) 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, 60644542743 + 60644542744.

It is an arithmetic number, because the mean of its divisors is an integer number (60644542744).

Almost surely, 2^121289085487 is an apocalyptic number.

121289085487 is a deficient number, since it is larger than the sum of its proper divisors (1).

121289085487 is an equidigital number, since it uses as much as digits as its factorization.

121289085487 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2580480, while the sum is 55.

The spelling of 121289085487 in words is "one hundred twenty-one billion, two hundred eighty-nine million, eighty-five thousand, four hundred eighty-seven".