1121135501 has 4 divisors (see below), whose sum is σ = 1121444412. Its totient is φ = 1120826592.

The previous prime is 1121135467. The next prime is 1121135537. The reversal of 1121135501 is 1055311211.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1055311211 = 6691 ⋅157721.

It can be written as a sum of positive squares in 2 ways, for example, as 360810025 + 760325476 = 18995^2 + 27574^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121135501 - 2¹⁰ = 1121134477 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 (1121135591) 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, 148946 + ... + 156291.

It is an arithmetic number, because the mean of its divisors is an integer number (280361103).

Almost surely, 2^1121135501 is an apocalyptic number.

It is an amenable number.

1121135501 is a deficient number, since it is larger than the sum of its proper divisors (308911).

1121135501 is an equidigital number, since it uses as much as digits as its factorization.

1121135501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308910.

The product of its (nonzero) digits is 150, while the sum is 20.

The square root of 1121135501 is about 33483.3615546588. The cubic root of 1121135501 is about 1038.8496591086.

Adding to 1121135501 its reverse (1055311211), we get a palindrome (2176446712).

The spelling of 1121135501 in words is "one billion, one hundred twenty-one million, one hundred thirty-five thousand, five hundred one".