1121121011 has 4 divisors (see below), whose sum is σ = 1180127400. Its totient is φ = 1062114624.

The previous prime is 1121120971. The next prime is 1121121017. The reversal of 1121121011 is 1101211211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1101211211 = 163 ⋅6755897.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1121121011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1121120983 and 1121121001.

It is not an unprimeable number, because it can be changed into a prime (1121121017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29503166 + ... + 29503203.

It is an arithmetic number, because the mean of its divisors is an integer number (295031850).

Almost surely, 2^1121121011 is an apocalyptic number.

1121121011 is a deficient number, since it is larger than the sum of its proper divisors (59006389).

1121121011 is an equidigital number, since it uses as much as digits as its factorization.

1121121011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59006388.

The product of its (nonzero) digits is 4, while the sum is 11.

The square root of 1121121011 is about 33483.1451778354. The cubic root of 1121121011 is about 1038.8451835876.

Adding to 1121121011 its reverse (1101211211), we get a palindrome (2222332222).

The spelling of 1121121011 in words is "one billion, one hundred twenty-one million, one hundred twenty-one thousand, eleven".