8811538121 has 2 divisors, whose sum is σ = 8811538122. Its totient is φ = 8811538120.

The previous prime is 8811538033. The next prime is 8811538133. The reversal of 8811538121 is 1218351188.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7609945225 + 1201592896 = 87235^2 + 34664^2 .

It is a cyclic number.

It is not a de Polignac number, because 8811538121 - 2¹⁴ = 8811521737 is a prime.

It is not a weakly prime, because it can be changed into another prime (8811538721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4405769060 + 4405769061.

It is an arithmetic number, because the mean of its divisors is an integer number (4405769061).

Almost surely, 2^8811538121 is an apocalyptic number.

It is an amenable number.

8811538121 is a deficient number, since it is larger than the sum of its proper divisors (1).

8811538121 is an equidigital number, since it uses as much as digits as its factorization.

8811538121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15360, while the sum is 38.

The square root of 8811538121 is about 93869.7934428323. The cubic root of 8811538121 is about 2065.4621529696.

The spelling of 8811538121 in words is "eight billion, eight hundred eleven million, five hundred thirty-eight thousand, one hundred twenty-one".