1121908037 has 4 divisors (see below), whose sum is σ = 1124363436. Its totient is φ = 1119452640.

The previous prime is 1121908031. The next prime is 1121908061. The reversal of 1121908037 is 7308091211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7308091211 = 547 ⋅13360313.

It can be written as a sum of positive squares in 2 ways, for example, as 1000709956 + 121198081 = 31634^2 + 11009^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121908037 - 2²⁰ = 1120859461 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1121907994 and 1121908012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121908031) 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, 1227014 + ... + 1227927.

It is an arithmetic number, because the mean of its divisors is an integer number (281090859).

Almost surely, 2^1121908037 is an apocalyptic number.

It is an amenable number.

1121908037 is a deficient number, since it is larger than the sum of its proper divisors (2455399).

1121908037 is an equidigital number, since it uses as much as digits as its factorization.

1121908037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2455398.

The product of its (nonzero) digits is 3024, while the sum is 32.

The square root of 1121908037 is about 33494.8956857608. The cubic root of 1121908037 is about 1039.0882162065.

Adding to 1121908037 its reverse (7308091211), we get a palindrome (8429999248).

The spelling of 1121908037 in words is "one billion, one hundred twenty-one million, nine hundred eight thousand, thirty-seven".