121645534523239 has 2 divisors, whose sum is σ = 121645534523240. Its totient is φ = 121645534523238.

The previous prime is 121645534523213. The next prime is 121645534523243. The reversal of 121645534523239 is 932325435546121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121645534523239 - 2⁹ = 121645534522727 is a prime.

It is a super-2 number, since 2×121645534523239² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121645534523239.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121645534523339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60822767261619 + 60822767261620.

It is an arithmetic number, because the mean of its divisors is an integer number (60822767261620).

Almost surely, 2^{121645534523239} is an apocalyptic number.

121645534523239 is a deficient number, since it is larger than the sum of its proper divisors (1).

121645534523239 is an equidigital number, since it uses as much as digits as its factorization.

121645534523239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328000, while the sum is 55.

The spelling of 121645534523239 in words is "one hundred twenty-one trillion, six hundred forty-five billion, five hundred thirty-four million, five hundred twenty-three thousand, two hundred thirty-nine".