1121011081 has 2 divisors, whose sum is σ = 1121011082. Its totient is φ = 1121011080.

The previous prime is 1121011069. The next prime is 1121011123. The reversal of 1121011081 is 1801101211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1058916681 + 62094400 = 32541^2 + 7880^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121011081 - 2⁵ = 1121011049 is a prime.

It is a super-3 number, since 3×1121011081³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (1121011051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560505540 + 560505541.

It is an arithmetic number, because the mean of its divisors is an integer number (560505541).

Almost surely, 2^1121011081 is an apocalyptic number.

It is an amenable number.

1121011081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121011081 is an equidigital number, since it uses as much as digits as its factorization.

1121011081 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 1121011081 is about 33481.5035654016. The cubic root of 1121011081 is about 1038.8112282927.

Adding to 1121011081 its reverse (1801101211), we get a palindrome (2922112292).

The spelling of 1121011081 in words is "one billion, one hundred twenty-one million, eleven thousand, eighty-one".