121000013 has 4 divisors (see below), whose sum is σ = 121051680. Its totient is φ = 120948348.

The previous prime is 121000003. The next prime is 121000049. The reversal of 121000013 is 310000121.

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: 310000121 = 73 ⋅4246577.

It is a cyclic number.

It is not a de Polignac number, because 121000013 - 2⁴ = 120999997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121000003) 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, 22145 + ... + 27062.

It is an arithmetic number, because the mean of its divisors is an integer number (30262920).

Almost surely, 2^121000013 is an apocalyptic number.

It is an amenable number.

121000013 is a deficient number, since it is larger than the sum of its proper divisors (51667).

121000013 is an equidigital number, since it uses as much as digits as its factorization.

121000013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51666.

The product of its (nonzero) digits is 6, while the sum is 8.

The square root of 121000013 is about 11000.0005909091. Note that the first 3 decimals coincide. The cubic root of 121000013 is about 494.6087620381.

Adding to 121000013 its reverse (310000121), we get a palindrome (431000134).

The spelling of 121000013 in words is "one hundred twenty-one million, thirteen", and thus it is an aban number.