1101128797 has 4 divisors (see below), whose sum is σ = 1101963676. Its totient is φ = 1100293920.

The previous prime is 1101128789. The next prime is 1101128803. The reversal of 1101128797 is 7978211011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7978211011 = 359 ⋅22223429.

It can be written as a sum of positive squares in 2 ways, for example, as 522533881 + 578594916 = 22859^2 + 24054^2 .

It is a cyclic number.

It is not a de Polignac number, because 1101128797 - 2³ = 1101128789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101128767) 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, 415458 + ... + 418099.

It is an arithmetic number, because the mean of its divisors is an integer number (275490919).

Almost surely, 2^1101128797 is an apocalyptic number.

It is an amenable number.

1101128797 is a deficient number, since it is larger than the sum of its proper divisors (834879).

1101128797 is an equidigital number, since it uses as much as digits as its factorization.

1101128797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 834878.

The product of its (nonzero) digits is 7056, while the sum is 37.

The square root of 1101128797 is about 33183.2607951660. The cubic root of 1101128797 is about 1032.6330961669.

The spelling of 1101128797 in words is "one billion, one hundred one million, one hundred twenty-eight thousand, seven hundred ninety-seven".