1131121001 has 8 divisors (see below), whose sum is σ = 1148865984. Its totient is φ = 1113401520.

The previous prime is 1131120983. The next prime is 1131121009. The reversal of 1131121001 is 1001211311.

It is a happy number.

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 1131121001 - 2⁶ = 1131120937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131121009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95651 + ... + 106823.

It is an arithmetic number, because the mean of its divisors is an integer number (143608248).

Almost surely, 2^1131121001 is an apocalyptic number.

It is an amenable number.

1131121001 is a deficient number, since it is larger than the sum of its proper divisors (17744983).

1131121001 is a wasteful number, since it uses less digits than its factorization.

1131121001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12751.

The product of its (nonzero) digits is 6, while the sum is 11.

The square root of 1131121001 is about 33632.1423789803. The cubic root of 1131121001 is about 1041.9247520026.

Adding to 1131121001 its reverse (1001211311), we get a palindrome (2132332312).

The spelling of 1131121001 in words is "one billion, one hundred thirty-one million, one hundred twenty-one thousand, one".