10111001 has 2 divisors, whose sum is σ = 10111002. Its totient is φ = 10111000.

The previous prime is 10110959. The next prime is 10111019. The reversal of 10111001 is 10011101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10086976 + 24025 = 3176^2 + 155^2 .

It is an emirp because it is prime and its reverse (10011101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10111001 - 2¹⁸ = 9848857 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (10111061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5055500 + 5055501.

It is an arithmetic number, because the mean of its divisors is an integer number (5055501).

Almost surely, 2^10111001 is an apocalyptic number.

It is an amenable number.

10111001 is a deficient number, since it is larger than the sum of its proper divisors (1).

10111001 is an equidigital number, since it uses as much as digits as its factorization.

10111001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1, while the sum is 5.

The square root of 10111001 is about 3179.7800238381. The cubic root of 10111001 is about 216.2376856008.

Adding to 10111001 its reverse (10011101), we get a palindrome (20122102).

Multiplying 10111001 by its reverse (10011101), we get a palindrome (101222252222101).

It can be divided in two parts, 1011100 and 1, that added together give a palindrome (1011101).

The spelling of 10111001 in words is "ten million, one hundred eleven thousand, one".