121315522313345 has 8 divisors (see below), whose sum is σ = 145707571536360. Its totient is φ = 96966454677120.

The previous prime is 121315522313329. The next prime is 121315522313389. The reversal of 121315522313345 is 543313225513121.

It can be written as a sum of positive squares in 4 ways, for example, as 1503583606849 + 119811938706496 = 1226207^2 + 10945864^2 .

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

It is not a de Polignac number, because 121315522313345 - 2⁴ = 121315522313329 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10745390486 + ... + 10745401775.

It is an arithmetic number, because the mean of its divisors is an integer number (18213446442045).

Almost surely, 2^{121315522313345} is an apocalyptic number.

It is an amenable number.

121315522313345 is a deficient number, since it is larger than the sum of its proper divisors (24392049223015).

121315522313345 is a wasteful number, since it uses less digits than its factorization.

121315522313345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21490793395.

The product of its digits is 324000, while the sum is 41.

Adding to 121315522313345 its reverse (543313225513121), we get a palindrome (664628747826466).

The spelling of 121315522313345 in words is "one hundred twenty-one trillion, three hundred fifteen billion, five hundred twenty-two million, three hundred thirteen thousand, three hundred forty-five".