121320113 has 4 divisors (see below), whose sum is σ = 123901440. Its totient is φ = 118738788.

The previous prime is 121320103. The next prime is 121320163. The reversal of 121320113 is 311023121.

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: 311023121 = 113 ⋅2752417.

It is a cyclic number.

It is not a de Polignac number, because 121320113 - 2⁸ = 121319857 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121320103) 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, 1290593 + ... + 1290686.

It is an arithmetic number, because the mean of its divisors is an integer number (30975360).

Almost surely, 2^121320113 is an apocalyptic number.

It is an amenable number.

121320113 is a deficient number, since it is larger than the sum of its proper divisors (2581327).

121320113 is an equidigital number, since it uses as much as digits as its factorization.

121320113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2581326.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 121320113 is about 11014.5409799955. The cubic root of 121320113 is about 495.0445329455.

Adding to 121320113 its reverse (311023121), we get a palindrome (432343234).

The spelling of 121320113 in words is "one hundred twenty-one million, three hundred twenty thousand, one hundred thirteen".