11121779 has 4 divisors (see below), whose sum is σ = 11132760. Its totient is φ = 11110800.

The previous prime is 11121767. The next prime is 11121823. The reversal of 11121779 is 97712111.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 97712111 = 7 ⋅13958873.

It is a cyclic number.

It is not a de Polignac number, because 11121779 - 2⁴ = 11121763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11121709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3797 + ... + 6054.

It is an arithmetic number, because the mean of its divisors is an integer number (2783190).

Almost surely, 2^11121779 is an apocalyptic number.

11121779 is a deficient number, since it is larger than the sum of its proper divisors (10981).

11121779 is an equidigital number, since it uses as much as digits as its factorization.

11121779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10980.

The product of its digits is 882, while the sum is 29.

The square root of 11121779 is about 3334.9331327629. The cubic root of 11121779 is about 223.2157082143.

The spelling of 11121779 in words is "eleven million, one hundred twenty-one thousand, seven hundred seventy-nine".