121061987 has 2 divisors, whose sum is σ = 121061988. Its totient is φ = 121061986.

The previous prime is 121061873. The next prime is 121062043. The reversal of 121061987 is 789160121.

It is a strong prime.

It is an emirp because it is prime and its reverse (789160121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121061987 - 2¹⁰ = 121060963 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (121061587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60530993 + 60530994.

It is an arithmetic number, because the mean of its divisors is an integer number (60530994).

Almost surely, 2^121061987 is an apocalyptic number.

121061987 is a deficient number, since it is larger than the sum of its proper divisors (1).

121061987 is an equidigital number, since it uses as much as digits as its factorization.

121061987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 35.

The square root of 121061987 is about 11002.8172301461. The cubic root of 121061987 is about 494.6931908214.

The spelling of 121061987 in words is "one hundred twenty-one million, sixty-one thousand, nine hundred eighty-seven".