121116402587 has 2 divisors, whose sum is σ = 121116402588. Its totient is φ = 121116402586.

The previous prime is 121116402553. The next prime is 121116402643. The reversal of 121116402587 is 785204611121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121116402587 - 2⁸ = 121116402331 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121116402587.

It is not a weakly prime, because it can be changed into another prime (121116402487) 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, 60558201293 + 60558201294.

It is an arithmetic number, because the mean of its divisors is an integer number (60558201294).

Almost surely, 2^121116402587 is an apocalyptic number.

121116402587 is a deficient number, since it is larger than the sum of its proper divisors (1).

121116402587 is an equidigital number, since it uses as much as digits as its factorization.

121116402587 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26880, while the sum is 38.

The spelling of 121116402587 in words is "one hundred twenty-one billion, one hundred sixteen million, four hundred two thousand, five hundred eighty-seven".