1131220113 has 8 divisors (see below), whose sum is σ = 1508450976. Its totient is φ = 754068000.

The previous prime is 1131220093. The next prime is 1131220127. The reversal of 1131220113 is 3110221311.

It is a happy number.

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

It is not a de Polignac number, because 1131220113 - 2⁸ = 1131219857 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1131220092 and 1131220101.

It is not an unprimeable number, because it can be changed into a prime (1131220133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37893 + ... + 60813.

It is an arithmetic number, because the mean of its divisors is an integer number (188556372).

Almost surely, 2^1131220113 is an apocalyptic number.

It is an amenable number.

1131220113 is a deficient number, since it is larger than the sum of its proper divisors (377230863).

1131220113 is a wasteful number, since it uses less digits than its factorization.

1131220113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39375.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1131220113 is about 33633.6158181067. The cubic root of 1131220113 is about 1041.9551832385.

Adding to 1131220113 its reverse (3110221311), we get a palindrome (4241441424).

The spelling of 1131220113 in words is "one billion, one hundred thirty-one million, two hundred twenty thousand, one hundred thirteen".