1131013121 has 8 divisors (see below), whose sum is σ = 1293588864. Its totient is φ = 968688000.

The previous prime is 1131013073. The next prime is 1131013129. The reversal of 1131013121 is 1213101311.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1131013121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1131013096 and 1131013105.

It is not an unprimeable number, because it can be changed into a prime (1131013129) 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, 52880 + ... + 71121.

It is an arithmetic number, because the mean of its divisors is an integer number (161698608).

Almost surely, 2^1131013121 is an apocalyptic number.

It is an amenable number.

1131013121 is a deficient number, since it is larger than the sum of its proper divisors (162575743).

1131013121 is a wasteful number, since it uses less digits than its factorization.

1131013121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125311.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 1131013121 is about 33630.5385178412. The cubic root of 1131013121 is about 1041.8916266294.

Adding to 1131013121 its reverse (1213101311), we get a palindrome (2344114432).

The spelling of 1131013121 in words is "one billion, one hundred thirty-one million, thirteen thousand, one hundred twenty-one".