121413613 has 4 divisors (see below), whose sum is σ = 124695100. Its totient is φ = 118132128.

The previous prime is 121413601. The next prime is 121413659. The reversal of 121413613 is 316314121.

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 48191364 + 73222249 = 6942^2 + 8557^2 .

It is a cyclic number.

It is not a de Polignac number, because 121413613 - 2¹⁷ = 121282541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121413713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1640688 + ... + 1640761.

It is an arithmetic number, because the mean of its divisors is an integer number (31173775).

Almost surely, 2^121413613 is an apocalyptic number.

It is an amenable number.

121413613 is a deficient number, since it is larger than the sum of its proper divisors (3281487).

121413613 is an equidigital number, since it uses as much as digits as its factorization.

121413613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3281486.

The product of its digits is 432, while the sum is 22.

The square root of 121413613 is about 11018.7845518460. The cubic root of 121413613 is about 495.1716753099.

Adding to 121413613 its reverse (316314121), we get a palindrome (437727734).

The spelling of 121413613 in words is "one hundred twenty-one million, four hundred thirteen thousand, six hundred thirteen".