7138121748481 has 2 divisors, whose sum is σ = 7138121748482. Its totient is φ = 7138121748480.

The previous prime is 7138121748473. The next prime is 7138121748623. The reversal of 7138121748481 is 1848471218317.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7117236874225 + 20884874256 = 2667815^2 + 144516^2 .

It is a cyclic number.

It is not a de Polignac number, because 7138121748481 - 2³ = 7138121748473 is a prime.

It is a super-2 number, since 2×7138121748481² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7138121748451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3569060874240 + 3569060874241.

It is an arithmetic number, because the mean of its divisors is an integer number (3569060874241).

Almost surely, 2^{7138121748481} is an apocalyptic number.

It is an amenable number.

7138121748481 is a deficient number, since it is larger than the sum of its proper divisors (1).

7138121748481 is an equidigital number, since it uses as much as digits as its factorization.

7138121748481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2408448, while the sum is 55.

The spelling of 7138121748481 in words is "seven trillion, one hundred thirty-eight billion, one hundred twenty-one million, seven hundred forty-eight thousand, four hundred eighty-one".