8011881121 has 2 divisors, whose sum is σ = 8011881122. Its totient is φ = 8011881120.

The previous prime is 8011881089. The next prime is 8011881151. The reversal of 8011881121 is 1211881108.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7594251025 + 417630096 = 87145^2 + 20436^2 .

It is a cyclic number.

It is not a de Polignac number, because 8011881121 - 2⁵ = 8011881089 is a prime.

It is not a weakly prime, because it can be changed into another prime (8011881151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4005940560 + 4005940561.

It is an arithmetic number, because the mean of its divisors is an integer number (4005940561).

Almost surely, 2^8011881121 is an apocalyptic number.

It is an amenable number.

8011881121 is a deficient number, since it is larger than the sum of its proper divisors (1).

8011881121 is an equidigital number, since it uses as much as digits as its factorization.

8011881121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1024, while the sum is 31.

The square root of 8011881121 is about 89509.1119439803. Note that the first 3 decimals coincide. The cubic root of 8011881121 is about 2000.9896036782.

The spelling of 8011881121 in words is "eight billion, eleven million, eight hundred eighty-one thousand, one hundred twenty-one".