121371587 has 2 divisors, whose sum is σ = 121371588. Its totient is φ = 121371586.

The previous prime is 121371577. The next prime is 121371611. The reversal of 121371587 is 785173121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121371587 - 2²⁰ = 120323011 is a prime.

It is not a weakly prime, because it can be changed into another prime (121371557) 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, 60685793 + 60685794.

It is an arithmetic number, because the mean of its divisors is an integer number (60685794).

Almost surely, 2^121371587 is an apocalyptic number.

121371587 is a deficient number, since it is larger than the sum of its proper divisors (1).

121371587 is an equidigital number, since it uses as much as digits as its factorization.

121371587 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11760, while the sum is 35.

The square root of 121371587 is about 11016.8773706527. The cubic root of 121371587 is about 495.1145359556.

The spelling of 121371587 in words is "one hundred twenty-one million, three hundred seventy-one thousand, five hundred eighty-seven".