8891121101 has 2 divisors, whose sum is σ = 8891121102. Its totient is φ = 8891121100.

The previous prime is 8891121089. The next prime is 8891121131. The reversal of 8891121101 is 1011211988.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5576355625 + 3314765476 = 74675^2 + 57574^2 .

It is a cyclic number.

It is not a de Polignac number, because 8891121101 - 2⁶ = 8891121037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8891121131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4445560550 + 4445560551.

It is an arithmetic number, because the mean of its divisors is an integer number (4445560551).

Almost surely, 2^8891121101 is an apocalyptic number.

It is an amenable number.

8891121101 is a deficient number, since it is larger than the sum of its proper divisors (1).

8891121101 is an equidigital number, since it uses as much as digits as its factorization.

8891121101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 32.

The square root of 8891121101 is about 94292.7415074989. The cubic root of 8891121101 is about 2071.6617228404.

The spelling of 8891121101 in words is "eight billion, eight hundred ninety-one million, one hundred twenty-one thousand, one hundred one".