7121312499 has 16 divisors (see below), whose sum is σ = 11422657280. Its totient is φ = 3855146400.

The previous prime is 7121312479. The next prime is 7121312503. The reversal of 7121312499 is 9942131217.

It is not a de Polignac number, because 7121312499 - 2⁸ = 7121312243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7121312479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8923552 + ... + 8924349.

It is an arithmetic number, because the mean of its divisors is an integer number (713916080).

Almost surely, 2^7121312499 is an apocalyptic number.

7121312499 is a deficient number, since it is larger than the sum of its proper divisors (4301344781).

7121312499 is a wasteful number, since it uses less digits than its factorization.

7121312499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17847930.

The product of its digits is 27216, while the sum is 39.

The square root of 7121312499 is about 84387.8693829866. The cubic root of 7121312499 is about 1923.9185469088.

The spelling of 7121312499 in words is "seven billion, one hundred twenty-one million, three hundred twelve thousand, four hundred ninety-nine".