121071387 has 4 divisors (see below), whose sum is σ = 161428520. Its totient is φ = 80714256.

The previous prime is 121071343. The next prime is 121071403. The reversal of 121071387 is 783170121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 783170121 = 3 ⋅261056707.

It is not a de Polignac number, because 121071387 - 2⁶ = 121071323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121071487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20178562 + ... + 20178567.

It is an arithmetic number, because the mean of its divisors is an integer number (40357130).

Almost surely, 2^121071387 is an apocalyptic number.

121071387 is a deficient number, since it is larger than the sum of its proper divisors (40357133).

121071387 is an equidigital number, since it uses as much as digits as its factorization.

121071387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40357132.

The product of its (nonzero) digits is 2352, while the sum is 30.

The square root of 121071387 is about 11003.2443851802. The cubic root of 121071387 is about 494.7059941678.

The spelling of 121071387 in words is "one hundred twenty-one million, seventy-one thousand, three hundred eighty-seven".