10111121 has 2 divisors, whose sum is σ = 10111122. Its totient is φ = 10111120.

The previous prime is 10111117. The next prime is 10111139. The reversal of 10111121 is 12111101.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5953600 + 4157521 = 2440^2 + 2039^2 .

It is a cyclic number.

It is not a de Polignac number, because 10111121 - 2² = 10111117 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 10111099 and 10111108.

It is not a weakly prime, because it can be changed into another prime (10113121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5055560 + 5055561.

It is an arithmetic number, because the mean of its divisors is an integer number (5055561).

Almost surely, 2^10111121 is an apocalyptic number.

It is an amenable number.

10111121 is a deficient number, since it is larger than the sum of its proper divisors (1).

10111121 is an equidigital number, since it uses as much as digits as its factorization.

10111121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2, while the sum is 8.

The square root of 10111121 is about 3179.7988930119. The cubic root of 10111121 is about 216.2385410525.

Adding to 10111121 its reverse (12111101), we get a palindrome (22222222).

The spelling of 10111121 in words is "ten million, one hundred eleven thousand, one hundred twenty-one".