1121154421 has 8 divisors (see below), whose sum is σ = 1154089944. Its totient is φ = 1088655360.

The previous prime is 1121154409. The next prime is 1121154431. The reversal of 1121154421 is 1244511211.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 119115396 + 1002039025 = 10914^2 + 31655^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1121154421 - 2²³ = 1112765813 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1121154392 and 1121154401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121154431) 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 7 ways as a sum of consecutive naturals, for example, 103900 + ... + 114181.

It is an arithmetic number, because the mean of its divisors is an integer number (144261243).

Almost surely, 2^1121154421 is an apocalyptic number.

It is an amenable number.

1121154421 is a deficient number, since it is larger than the sum of its proper divisors (32935523).

1121154421 is an equidigital number, since it uses as much as digits as its factorization.

1121154421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218231.

The product of its digits is 320, while the sum is 22.

The square root of 1121154421 is about 33483.6440818499. The cubic root of 1121154421 is about 1038.8555028640.

Adding to 1121154421 its reverse (1244511211), we get a palindrome (2365665632).

The spelling of 1121154421 in words is "one billion, one hundred twenty-one million, one hundred fifty-four thousand, four hundred twenty-one".