121345147 has 16 divisors (see below), whose sum is σ = 152404992. Its totient is φ = 93856320.

The previous prime is 121345121. The next prime is 121345151. The reversal of 121345147 is 741543121.

It is a cyclic number.

It is not a de Polignac number, because 121345147 - 2¹¹ = 121343099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121348147) 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 15 ways as a sum of consecutive naturals, for example, 4798 + ... + 16300.

It is an arithmetic number, because the mean of its divisors is an integer number (9525312).

Almost surely, 2^121345147 is an apocalyptic number.

121345147 is a deficient number, since it is larger than the sum of its proper divisors (31059845).

121345147 is a wasteful number, since it uses less digits than its factorization.

121345147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11658.

The product of its digits is 3360, while the sum is 28.

The square root of 121345147 is about 11015.6773282445. The cubic root of 121345147 is about 495.0785808655.

Adding to 121345147 its reverse (741543121), we get a palindrome (862888268).

It can be divided in two parts, 1213 and 45147, that added together give a triangular number (46360 = T₃₀₄).

The spelling of 121345147 in words is "one hundred twenty-one million, three hundred forty-five thousand, one hundred forty-seven".