11111089001 has 2 divisors, whose sum is σ = 11111089002. Its totient is φ = 11111089000.

The previous prime is 11111088979. The next prime is 11111089039. The reversal of 11111089001 is 10098011111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10925475625 + 185613376 = 104525^2 + 13624^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11111089001 is a prime.

It is not a weakly prime, because it can be changed into another prime (11111089091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555544500 + 5555544501.

It is an arithmetic number, because the mean of its divisors is an integer number (5555544501).

Almost surely, 2^11111089001 is an apocalyptic number.

It is an amenable number.

11111089001 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111089001 is an equidigital number, since it uses as much as digits as its factorization.

11111089001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 23.

The spelling of 11111089001 in words is "eleven billion, one hundred eleven million, eighty-nine thousand, one".