1121885311 has 4 divisors (see below), whose sum is σ = 1122406624. Its totient is φ = 1121364000.

The previous prime is 1121885299. The next prime is 1121885321. The reversal of 1121885311 is 1135881211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1135881211 = 523 ⋅2171857.

It is a cyclic number.

It is not a de Polignac number, because 1121885311 - 2⁷ = 1121885183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121885321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 257415 + ... + 261736.

It is an arithmetic number, because the mean of its divisors is an integer number (280601656).

Almost surely, 2^1121885311 is an apocalyptic number.

1121885311 is a deficient number, since it is larger than the sum of its proper divisors (521313).

1121885311 is an equidigital number, since it uses as much as digits as its factorization.

1121885311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521312.

The product of its digits is 1920, while the sum is 31.

The square root of 1121885311 is about 33494.5564383229. The cubic root of 1121885311 is about 1039.0812000408.

The spelling of 1121885311 in words is "one billion, one hundred twenty-one million, eight hundred eighty-five thousand, three hundred eleven".