7551123121 has 8 divisors (see below), whose sum is σ = 8091637344. Its totient is φ = 7021312320.

The previous prime is 7551123103. The next prime is 7551123157. The reversal of 7551123121 is 1213211557.

7551123121 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 7551123121 - 2¹⁷ = 7550992049 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7551123121.

It is not an unprimeable number, because it can be changed into a prime (7551123221) 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, 2674395 + ... + 2677216.

It is an arithmetic number, because the mean of its divisors is an integer number (1011454668).

Almost surely, 2^7551123121 is an apocalyptic number.

It is an amenable number.

7551123121 is a deficient number, since it is larger than the sum of its proper divisors (540514223).

7551123121 is a wasteful number, since it uses less digits than its factorization.

7551123121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5351711.

The product of its digits is 2100, while the sum is 28.

The square root of 7551123121 is about 86897.1985797011. The cubic root of 7551123121 is about 1961.8713143621.

Adding to 7551123121 its reverse (1213211557), we get a palindrome (8764334678).

The spelling of 7551123121 in words is "seven billion, five hundred fifty-one million, one hundred twenty-three thousand, one hundred twenty-one".