1131001123 has 4 divisors (see below), whose sum is σ = 1292572720. Its totient is φ = 969429528.

The previous prime is 1131001097. The next prime is 1131001127. The reversal of 1131001123 is 3211001311.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1131001123 - 2²⁹ = 594130211 is a prime.

It is a super-2 number, since 2×1131001123² = 2558327080454522258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131001127) 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, 80785788 + ... + 80785801.

It is an arithmetic number, because the mean of its divisors is an integer number (323143180).

Almost surely, 2^1131001123 is an apocalyptic number.

1131001123 is a deficient number, since it is larger than the sum of its proper divisors (161571597).

1131001123 is an equidigital number, since it uses as much as digits as its factorization.

1131001123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161571596.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 1131001123 is about 33630.3601378278. The cubic root of 1131001123 is about 1041.8879424223.

Adding to 1131001123 its reverse (3211001311), we get a palindrome (4342002434).

The spelling of 1131001123 in words is "one billion, one hundred thirty-one million, one thousand, one hundred twenty-three".