89011001021 has 2 divisors, whose sum is σ = 89011001022. Its totient is φ = 89011001020.

The previous prime is 89011001011. The next prime is 89011001039. The reversal of 89011001021 is 12010011098.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80290056025 + 8720944996 = 283355^2 + 93386^2 .

It is a cyclic number.

It is not a de Polignac number, because 89011001021 - 2¹⁴ = 89010984637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89011001011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44505500510 + 44505500511.

It is an arithmetic number, because the mean of its divisors is an integer number (44505500511).

Almost surely, 2^89011001021 is an apocalyptic number.

It is an amenable number.

89011001021 is a deficient number, since it is larger than the sum of its proper divisors (1).

89011001021 is an equidigital number, since it uses as much as digits as its factorization.

89011001021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 23.

The spelling of 89011001021 in words is "eighty-nine billion, eleven million, one thousand, twenty-one".