121840971 has 16 divisors (see below), whose sum is σ = 190192128. Its totient is φ = 67924800.

The previous prime is 121840951. The next prime is 121840987. The reversal of 121840971 is 179048121.

It is not a de Polignac number, because 121840971 - 2¹³ = 121832779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121840931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69895 + ... + 71616.

It is an arithmetic number, because the mean of its divisors is an integer number (11887008).

Almost surely, 2^121840971 is an apocalyptic number.

121840971 is a deficient number, since it is larger than the sum of its proper divisors (68351157).

121840971 is a wasteful number, since it uses less digits than its factorization.

121840971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141562.

The product of its (nonzero) digits is 4032, while the sum is 33.

The square root of 121840971 is about 11038.1597651058. The cubic root of 121840971 is about 495.7519720624.

The spelling of 121840971 in words is "one hundred twenty-one million, eight hundred forty thousand, nine hundred seventy-one".