121520341 has 4 divisors (see below), whose sum is σ = 125440384. Its totient is φ = 117600300.

The previous prime is 121520317. The next prime is 121520359. The reversal of 121520341 is 143025121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 143025121 = 6451 ⋅22171.

It is a cyclic number.

It is not a de Polignac number, because 121520341 - 2⁵ = 121520309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121520381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1959975 + ... + 1960036.

It is an arithmetic number, because the mean of its divisors is an integer number (31360096).

Almost surely, 2^121520341 is an apocalyptic number.

It is an amenable number.

121520341 is a deficient number, since it is larger than the sum of its proper divisors (3920043).

121520341 is an equidigital number, since it uses as much as digits as its factorization.

121520341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3920042.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 121520341 is about 11023.6264904069. The cubic root of 121520341 is about 495.3167255047.

Adding to 121520341 its reverse (143025121), we get a palindrome (264545462).

The spelling of 121520341 in words is "one hundred twenty-one million, five hundred twenty thousand, three hundred forty-one".