612336121 has 4 divisors (see below), whose sum is σ = 613335652. Its totient is φ = 611336592.

The previous prime is 612336119. The next prime is 612336169. The reversal of 612336121 is 121633216.

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 19900521 + 592435600 = 4461^2 + 24340^2 .

It is a cyclic number.

It is not a de Polignac number, because 612336121 - 2¹ = 612336119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (612339121) 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, 498846 + ... + 500071.

It is an arithmetic number, because the mean of its divisors is an integer number (153333913).

Almost surely, 2^612336121 is an apocalyptic number.

It is an amenable number.

612336121 is a deficient number, since it is larger than the sum of its proper divisors (999531).

612336121 is an equidigital number, since it uses as much as digits as its factorization.

612336121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999530.

The product of its digits is 1296, while the sum is 25.

The square root of 612336121 is about 24745.4262642614. The cubic root of 612336121 is about 849.1738783148.

Adding to 612336121 its reverse (121633216), we get a palindrome (733969337).

The spelling of 612336121 in words is "six hundred twelve million, three hundred thirty-six thousand, one hundred twenty-one".