1145351121 has 4 divisors (see below), whose sum is σ = 1527134832. Its totient is φ = 763567412.

The previous prime is 1145351101. The next prime is 1145351153. The reversal of 1145351121 is 1211535411.

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: 1211535411 = 3 ⋅403845137.

It is a cyclic number.

It is not a de Polignac number, because 1145351121 - 2⁷ = 1145350993 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1145351091 and 1145351100.

It is not an unprimeable number, because it can be changed into a prime (1145351101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190891851 + ... + 190891856.

It is an arithmetic number, because the mean of its divisors is an integer number (381783708).

Almost surely, 2^1145351121 is an apocalyptic number.

It is an amenable number.

1145351121 is a deficient number, since it is larger than the sum of its proper divisors (381783711).

1145351121 is an equidigital number, since it uses as much as digits as its factorization.

1145351121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381783710.

The product of its digits is 600, while the sum is 24.

The square root of 1145351121 is about 33843.0365215653. The cubic root of 1145351121 is about 1046.2758836480.

Adding to 1145351121 its reverse (1211535411), we get a palindrome (2356886532).

The spelling of 1145351121 in words is "one billion, one hundred forty-five million, three hundred fifty-one thousand, one hundred twenty-one".