121304513 has 4 divisors (see below), whose sum is σ = 132332208. Its totient is φ = 110276820.

The previous prime is 121304501. The next prime is 121304551. The reversal of 121304513 is 315403121.

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: 315403121 = 11 ⋅28673011.

It is a cyclic number.

It is not a de Polignac number, because 121304513 - 2⁴ = 121304497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121304713) 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, 5513831 + ... + 5513852.

It is an arithmetic number, because the mean of its divisors is an integer number (33083052).

Almost surely, 2^121304513 is an apocalyptic number.

It is an amenable number.

121304513 is a deficient number, since it is larger than the sum of its proper divisors (11027695).

121304513 is a wasteful number, since it uses less digits than its factorization.

121304513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11027694.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 121304513 is about 11013.8328024353. The cubic root of 121304513 is about 495.0233135297.

Adding to 121304513 its reverse (315403121), we get a palindrome (436707634).

The spelling of 121304513 in words is "one hundred twenty-one million, three hundred four thousand, five hundred thirteen".