7121785685125 has 32 divisors (see below), whose sum is σ = 9280820001024. Its totient is φ = 5445955240000.

The previous prime is 7121785685117. The next prime is 7121785685137. The reversal of 7121785685125 is 5215865871217.

It is not a de Polignac number, because 7121785685125 - 2³ = 7121785685117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7121785685125.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3318027 + ... + 5025223.

It is an arithmetic number, because the mean of its divisors is an integer number (290025625032).

Almost surely, 2^{7121785685125} is an apocalyptic number.

It is an amenable number.

7121785685125 is a deficient number, since it is larger than the sum of its proper divisors (2159034315899).

7121785685125 is a wasteful number, since it uses less digits than its factorization.

7121785685125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1708686 (or 1708676 counting only the distinct ones).

The product of its digits is 9408000, while the sum is 58.

The spelling of 7121785685125 in words is "seven trillion, one hundred twenty-one billion, seven hundred eighty-five million, six hundred eighty-five thousand, one hundred twenty-five".