121342013 has 4 divisors (see below), whose sum is σ = 130676028. Its totient is φ = 112008000.

The previous prime is 121342009. The next prime is 121342031. The reversal of 121342013 is 310243121.

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 35557369 + 85784644 = 5963^2 + 9262^2 .

It is not a de Polignac number, because 121342013 - 2² = 121342009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121341982 and 121342000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121342093) 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, 4666988 + ... + 4667013.

It is an arithmetic number, because the mean of its divisors is an integer number (32669007).

Almost surely, 2^121342013 is an apocalyptic number.

121342013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

121342013 is a deficient number, since it is larger than the sum of its proper divisors (9334015).

121342013 is an equidigital number, since it uses as much as digits as its factorization.

121342013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9334014.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 121342013 is about 11015.5350755195. The cubic root of 121342013 is about 495.0743186716.

Adding to 121342013 its reverse (310243121), we get a palindrome (431585134).

The spelling of 121342013 in words is "one hundred twenty-one million, three hundred forty-two thousand, thirteen".