900011101081 has 2 divisors, whose sum is σ = 900011101082. Its totient is φ = 900011101080.

The previous prime is 900011101079. The next prime is 900011101123. The reversal of 900011101081 is 180101110009.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 877811591056 + 22199510025 = 936916^2 + 148995^2 .

It is a cyclic number.

It is not a de Polignac number, because 900011101081 - 2¹ = 900011101079 is a prime.

It is a super-2 number, since 2×900011101081² (a number of 25 digits) contains 22 as substring.

Together with 900011101079, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (900011101001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450005550540 + 450005550541.

It is an arithmetic number, because the mean of its divisors is an integer number (450005550541).

Almost surely, 2^900011101081 is an apocalyptic number.

It is an amenable number.

900011101081 is a deficient number, since it is larger than the sum of its proper divisors (1).

900011101081 is an equidigital number, since it uses as much as digits as its factorization.

900011101081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 22.

The spelling of 900011101081 in words is "nine hundred billion, eleven million, one hundred one thousand, eighty-one".