7148221160261 has 2 divisors, whose sum is σ = 7148221160262. Its totient is φ = 7148221160260.

The previous prime is 7148221160189. The next prime is 7148221160263. The reversal of 7148221160261 is 1620611228417.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3690648263236 + 3457572897025 = 1921106^2 + 1859455^2 .

It is a cyclic number.

It is not a de Polignac number, because 7148221160261 - 2¹⁰ = 7148221159237 is a prime.

Together with 7148221160263, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7148221160263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3574110580130 + 3574110580131.

It is an arithmetic number, because the mean of its divisors is an integer number (3574110580131).

Almost surely, 2^{7148221160261} is an apocalyptic number.

It is an amenable number.

7148221160261 is a deficient number, since it is larger than the sum of its proper divisors (1).

7148221160261 is an equidigital number, since it uses as much as digits as its factorization.

7148221160261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64512, while the sum is 41.

Adding to 7148221160261 its reverse (1620611228417), we get a palindrome (8768832388678).

The spelling of 7148221160261 in words is "seven trillion, one hundred forty-eight billion, two hundred twenty-one million, one hundred sixty thousand, two hundred sixty-one".