111031121 has 2 divisors, whose sum is σ = 111031122. Its totient is φ = 111031120.

The previous prime is 111031099. The next prime is 111031153. The reversal of 111031121 is 121130111.

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., 84364225 + 26666896 = 9185^2 + 5164^2 .

It is a cyclic number.

It is not a de Polignac number, because 111031121 - 2¹⁰ = 111030097 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (111031021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55515560 + 55515561.

It is an arithmetic number, because the mean of its divisors is an integer number (55515561).

Almost surely, 2^111031121 is an apocalyptic number.

It is an amenable number.

111031121 is a deficient number, since it is larger than the sum of its proper divisors (1).

111031121 is an equidigital number, since it uses as much as digits as its factorization.

111031121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6, while the sum is 11.

The square root of 111031121 is about 10537.1305866445. The cubic root of 111031121 is about 480.6344633703.

Adding to 111031121 its reverse (121130111), we get a palindrome (232161232).

The spelling of 111031121 in words is "one hundred eleven million, thirty-one thousand, one hundred twenty-one".