7121387571715 has 16 divisors (see below), whose sum is σ = 8610793430688. Its totient is φ = 5653794422016.

The previous prime is 7121387571673. The next prime is 7121387571751. The reversal of 7121387571715 is 5171757831217.

It is a cyclic number.

It is not a de Polignac number, because 7121387571715 - 2¹³ = 7121387563523 is a prime.

It is a super-4 number, since 4×7121387571715⁴ (a number of 53 digits) contains 4444 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5901642 + ... + 7005151.

It is an arithmetic number, because the mean of its divisors is an integer number (538174589418).

Almost surely, 2^{7121387571715} is an apocalyptic number.

7121387571715 is a deficient number, since it is larger than the sum of its proper divisors (1489405858973).

7121387571715 is a wasteful number, since it uses less digits than its factorization.

7121387571715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12907638.

The product of its digits is 2881200, while the sum is 55.

The spelling of 7121387571715 in words is "seven trillion, one hundred twenty-one billion, three hundred eighty-seven million, five hundred seventy-one thousand, seven hundred fifteen".