121121393 has 4 divisors (see below), whose sum is σ = 121300980. Its totient is φ = 120941808.

The previous prime is 121121389. The next prime is 121121401. The reversal of 121121393 is 393121121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 108326464 + 12794929 = 10408^2 + 3577^2 .

It is a cyclic number.

It is not a de Polignac number, because 121121393 - 2² = 121121389 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 (121121383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88778 + ... + 90131.

It is an arithmetic number, because the mean of its divisors is an integer number (30325245).

Almost surely, 2^121121393 is an apocalyptic number.

It is an amenable number.

121121393 is a deficient number, since it is larger than the sum of its proper divisors (179587).

121121393 is an equidigital number, since it uses as much as digits as its factorization.

121121393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179586.

The product of its digits is 324, while the sum is 23.

The square root of 121121393 is about 11005.5164803838. The cubic root of 121121393 is about 494.7740941085.

The spelling of 121121393 in words is "one hundred twenty-one million, one hundred twenty-one thousand, three hundred ninety-three".