1110121081 has 2 divisors, whose sum is σ = 1110121082. Its totient is φ = 1110121080.

The previous prime is 1110121069. The next prime is 1110121091. The reversal of 1110121081 is 1801210111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 692531856 + 417589225 = 26316^2 + 20435^2 .

It is a cyclic number.

It is not a de Polignac number, because 1110121081 - 2⁹ = 1110120569 is a prime.

It is a super-2 number, since 2×1110121081² = 2464737628961217122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1110121021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555060540 + 555060541.

It is an arithmetic number, because the mean of its divisors is an integer number (555060541).

Almost surely, 2^1110121081 is an apocalyptic number.

It is an amenable number.

1110121081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1110121081 is an equidigital number, since it uses as much as digits as its factorization.

1110121081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 16.

The square root of 1110121081 is about 33318.4795721533. The cubic root of 1110121081 is about 1035.4364518642.

Adding to 1110121081 its reverse (1801210111), we get a palindrome (2911331192).

The spelling of 1110121081 in words is "one billion, one hundred ten million, one hundred twenty-one thousand, eighty-one".