121315522313255 has 16 divisors (see below), whose sum is σ = 148166522157600. Its totient is φ = 95329831175040.

The previous prime is 121315522313243. The next prime is 121315522313257. The reversal of 121315522313255 is 552313225513121.

It is not a de Polignac number, because 121315522313255 - 2⁴ = 121315522313239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121315522313257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166943816 + ... + 167668925.

It is an arithmetic number, because the mean of its divisors is an integer number (9260407634850).

Almost surely, 2^{121315522313255} is an apocalyptic number.

121315522313255 is a deficient number, since it is larger than the sum of its proper divisors (26850999844345).

121315522313255 is a wasteful number, since it uses less digits than its factorization.

121315522313255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334614034.

The product of its digits is 270000, while the sum is 41.

Adding to 121315522313255 its reverse (552313225513121), we get a palindrome (673628747826376).

The spelling of 121315522313255 in words is "one hundred twenty-one trillion, three hundred fifteen billion, five hundred twenty-two million, three hundred thirteen thousand, two hundred fifty-five".