7857221507119 has 2 divisors, whose sum is σ = 7857221507120. Its totient is φ = 7857221507118.

The previous prime is 7857221507059. The next prime is 7857221507143. The reversal of 7857221507119 is 9117051227587.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7857221507119 - 2¹⁷ = 7857221376047 is a prime.

It is a super-2 number, since 2×7857221507119² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7857221507119.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7857221507419) by changing a digit.

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 as a sum of consecutive naturals, namely, 3928610753559 + 3928610753560.

It is an arithmetic number, because the mean of its divisors is an integer number (3928610753560).

Almost surely, 2^{7857221507119} is an apocalyptic number.

7857221507119 is a deficient number, since it is larger than the sum of its proper divisors (1).

7857221507119 is an equidigital number, since it uses as much as digits as its factorization.

7857221507119 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2469600, while the sum is 55.

The spelling of 7857221507119 in words is "seven trillion, eight hundred fifty-seven billion, two hundred twenty-one million, five hundred seven thousand, one hundred nineteen".