1121994529 has 4 divisors (see below), whose sum is σ = 1138740784. Its totient is φ = 1105248276.

The previous prime is 1121994521. The next prime is 1121994541. The reversal of 1121994529 is 9254991211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9254991211 = 631 ⋅14667181.

It is a cyclic number.

It is not a de Polignac number, because 1121994529 - 2³ = 1121994521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121994521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8373027 + ... + 8373160.

It is an arithmetic number, because the mean of its divisors is an integer number (284685196).

Almost surely, 2^1121994529 is an apocalyptic number.

It is an amenable number.

1121994529 is a deficient number, since it is larger than the sum of its proper divisors (16746255).

1121994529 is an equidigital number, since it uses as much as digits as its factorization.

1121994529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16746254.

The product of its digits is 58320, while the sum is 43.

The square root of 1121994529 is about 33496.1867829758. The cubic root of 1121994529 is about 1039.1149178926.

The spelling of 1121994529 in words is "one billion, one hundred twenty-one million, nine hundred ninety-four thousand, five hundred twenty-nine".