1121305551 has 8 divisors (see below), whose sum is σ = 1496925360. Its totient is φ = 746611392.

The previous prime is 1121305543. The next prime is 1121305553. The reversal of 1121305551 is 1555031211.

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

It is not a de Polignac number, because 1121305551 - 2³ = 1121305543 is a prime.

It is a super-2 number, since 2×1121305551² = 2514652277406827202, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121305553) 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, 228580 + ... + 233433.

It is an arithmetic number, because the mean of its divisors is an integer number (187115670).

Almost surely, 2^1121305551 is an apocalyptic number.

1121305551 is a deficient number, since it is larger than the sum of its proper divisors (375619809).

1121305551 is an equidigital number, since it uses as much as digits as its factorization.

1121305551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462825.

The product of its (nonzero) digits is 750, while the sum is 24.

The square root of 1121305551 is about 33485.9007792832. The cubic root of 1121305551 is about 1038.9021795083.

Adding to 1121305551 its reverse (1555031211), we get a palindrome (2676336762).

The spelling of 1121305551 in words is "one billion, one hundred twenty-one million, three hundred five thousand, five hundred fifty-one".