1105111121 has 2 divisors, whose sum is σ = 1105111122. Its totient is φ = 1105111120.

The previous prime is 1105111103. The next prime is 1105111127. The reversal of 1105111121 is 1211115011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 896164096 + 208947025 = 29936^2 + 14455^2 .

It is an emirp because it is prime and its reverse (1211115011) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1105111121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1105111096 and 1105111105.

It is not a weakly prime, because it can be changed into another prime (1105111127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 552555560 + 552555561.

It is an arithmetic number, because the mean of its divisors is an integer number (552555561).

Almost surely, 2^1105111121 is an apocalyptic number.

It is an amenable number.

1105111121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1105111121 is an equidigital number, since it uses as much as digits as its factorization.

1105111121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10, while the sum is 14.

The square root of 1105111121 is about 33243.2116529074. The cubic root of 1105111121 is about 1033.8764663166.

Adding to 1105111121 its reverse (1211115011), we get a palindrome (2316226132).

The spelling of 1105111121 in words is "one billion, one hundred five million, one hundred eleven thousand, one hundred twenty-one".