121313245 has 8 divisors (see below), whose sum is σ = 145644984. Its totient is φ = 97004544.

The previous prime is 121313243. The next prime is 121313273. The reversal of 121313245 is 542313121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 599076 + 120714169 = 774^2 + 10987^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121313245 - 2¹ = 121313243 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 (121313243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9517 + ... + 18253.

It is an arithmetic number, because the mean of its divisors is an integer number (18205623).

Almost surely, 2^121313245 is an apocalyptic number.

It is an amenable number.

121313245 is a deficient number, since it is larger than the sum of its proper divisors (24331739).

121313245 is an equidigital number, since it uses as much as digits as its factorization.

121313245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11519.

The product of its digits is 720, while the sum is 22.

The square root of 121313245 is about 11014.2292058954. The cubic root of 121313245 is about 495.0351911858.

Adding to 121313245 its reverse (542313121), we get a palindrome (663626366).

It can be divided in two parts, 12131 and 3245, that added together give a square (15376 = 124²).

The spelling of 121313245 in words is "one hundred twenty-one million, three hundred thirteen thousand, two hundred forty-five".