13215626064121 has 4 divisors (see below), whose sum is σ = 14232212684452. Its totient is φ = 12199039443792.

The previous prime is 13215626064103. The next prime is 13215626064167. The reversal of 13215626064121 is 12146062651231.

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 5836036492521 + 7379589571600 = 2415789^2 + 2716540^2 .

It is a cyclic number.

It is not a de Polignac number, because 13215626064121 - 2¹¹ = 13215626062073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13215626064181) 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, 508293310146 + ... + 508293310171.

It is an arithmetic number, because the mean of its divisors is an integer number (3558053171113).

Almost surely, 2^{13215626064121} is an apocalyptic number.

It is an amenable number.

13215626064121 is a deficient number, since it is larger than the sum of its proper divisors (1016586620331).

13215626064121 is a wasteful number, since it uses less digits than its factorization.

13215626064121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1016586620330.

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 13215626064121 in words is "thirteen trillion, two hundred fifteen billion, six hundred twenty-six million, sixty-four thousand, one hundred twenty-one".