7722886121 has 2 divisors, whose sum is σ = 7722886122. Its totient is φ = 7722886120.

The previous prime is 7722886057. The next prime is 7722886141. The reversal of 7722886121 is 1216882277.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5922072025 + 1800814096 = 76955^2 + 42436^2 .

It is a cyclic number.

It is not a de Polignac number, because 7722886121 - 2⁶ = 7722886057 is a prime.

It is not a weakly prime, because it can be changed into another prime (7722886141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3861443060 + 3861443061.

It is an arithmetic number, because the mean of its divisors is an integer number (3861443061).

Almost surely, 2^7722886121 is an apocalyptic number.

It is an amenable number.

7722886121 is a deficient number, since it is larger than the sum of its proper divisors (1).

7722886121 is an equidigital number, since it uses as much as digits as its factorization.

7722886121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 150528, while the sum is 44.

The square root of 7722886121 is about 87879.9528959819. The cubic root of 7722886121 is about 1976.6352847088.

The spelling of 7722886121 in words is "seven billion, seven hundred twenty-two million, eight hundred eighty-six thousand, one hundred twenty-one".