121520041 has 8 divisors (see below), whose sum is σ = 122946120. Its totient is φ = 120102528.

The previous prime is 121520039. The next prime is 121520053. The reversal of 121520041 is 140025121.

It can be written as a sum of positive squares in 4 ways, for example, as 19105641 + 102414400 = 4371^2 + 10120^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121520041 - 2¹ = 121520039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121519997 and 121520024.

It is not an unprimeable number, because it can be changed into a prime (121520011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28965 + ... + 32893.

It is an arithmetic number, because the mean of its divisors is an integer number (15368265).

Almost surely, 2^121520041 is an apocalyptic number.

It is an amenable number.

121520041 is a deficient number, since it is larger than the sum of its proper divisors (1426079).

121520041 is a wasteful number, since it uses less digits than its factorization.

121520041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4283.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 121520041 is about 11023.6128832611. The cubic root of 121520041 is about 495.3163179045.

Adding to 121520041 its reverse (140025121), we get a palindrome (261545162).

The spelling of 121520041 in words is "one hundred twenty-one million, five hundred twenty thousand, forty-one".