121315043 has 4 divisors (see below), whose sum is σ = 128451240. Its totient is φ = 114178848.

The previous prime is 121315027. The next prime is 121315063. The reversal of 121315043 is 340513121.

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

It is a cyclic number.

It is not a de Polignac number, because 121315043 - 2⁴ = 121315027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121315003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3568073 + ... + 3568106.

It is an arithmetic number, because the mean of its divisors is an integer number (32112810).

Almost surely, 2^121315043 is an apocalyptic number.

121315043 is a deficient number, since it is larger than the sum of its proper divisors (7136197).

121315043 is an equidigital number, since it uses as much as digits as its factorization.

121315043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7136196.

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

The square root of 121315043 is about 11014.3108272828. The cubic root of 121315043 is about 495.0376368349.

Adding to 121315043 its reverse (340513121), we get a palindrome (461828164).

The spelling of 121315043 in words is "one hundred twenty-one million, three hundred fifteen thousand, forty-three".