7122421447 has 2 divisors, whose sum is σ = 7122421448. Its totient is φ = 7122421446.

The previous prime is 7122421421. The next prime is 7122421451. The reversal of 7122421447 is 7441242217.

It is a strong prime.

It is an emirp because it is prime and its reverse (7441242217) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7122421447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7122421457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3561210723 + 3561210724.

It is an arithmetic number, because the mean of its divisors is an integer number (3561210724).

Almost surely, 2^7122421447 is an apocalyptic number.

7122421447 is a deficient number, since it is larger than the sum of its proper divisors (1).

7122421447 is an equidigital number, since it uses as much as digits as its factorization.

7122421447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25088, while the sum is 34.

The square root of 7122421447 is about 84394.4396687365. The cubic root of 7122421447 is about 1924.0184074747.

The spelling of 7122421447 in words is "seven billion, one hundred twenty-two million, four hundred twenty-one thousand, four hundred forty-seven".