121315455021345 has 64 divisors (see below), whose sum is σ = 209990211696384. Its totient is φ = 59452270617600.

The previous prime is 121315455021307. The next prime is 121315455021359. The reversal of 121315455021345 is 543120554513121.

It is not a de Polignac number, because 121315455021345 - 2⁹ = 121315455020833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121315455021297 and 121315455021306.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 55701279 + ... + 57838251.

It is an arithmetic number, because the mean of its divisors is an integer number (3281097057756).

Almost surely, 2^{121315455021345} is an apocalyptic number.

121315455021345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121315455021345 is a deficient number, since it is larger than the sum of its proper divisors (88674756675039).

121315455021345 is a wasteful number, since it uses less digits than its factorization.

121315455021345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2138322.

The product of its (nonzero) digits is 360000, while the sum is 42.

The spelling of 121315455021345 in words is "one hundred twenty-one trillion, three hundred fifteen billion, four hundred fifty-five million, twenty-one thousand, three hundred forty-five".