1089795121 has 4 divisors (see below), whose sum is σ = 1102040100. Its totient is φ = 1077550144.

The previous prime is 1089795101. The next prime is 1089795143. The reversal of 1089795121 is 1215979801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1215979801 = 23 ⋅52868687.

It can be written as a sum of positive squares in 2 ways, for example, as 245079025 + 844716096 = 15655^2 + 29064^2 .

It is a cyclic number.

It is not a de Polignac number, because 1089795121 - 2¹⁵ = 1089762353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1089795101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6122356 + ... + 6122533.

It is an arithmetic number, because the mean of its divisors is an integer number (275510025).

Almost surely, 2^1089795121 is an apocalyptic number.

It is an amenable number.

1089795121 is a deficient number, since it is larger than the sum of its proper divisors (12244979).

1089795121 is an equidigital number, since it uses as much as digits as its factorization.

1089795121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12244978.

The product of its (nonzero) digits is 45360, while the sum is 43.

The square root of 1089795121 is about 33012.0450896336. The cubic root of 1089795121 is about 1029.0779825069.

The spelling of 1089795121 in words is "one billion, eighty-nine million, seven hundred ninety-five thousand, one hundred twenty-one".