1113223121 has 8 divisors (see below), whose sum is σ = 1179103464. Its totient is φ = 1047386880.

The previous prime is 1113223109. The next prime is 1113223123. The reversal of 1113223121 is 1213223111.

It can be written as a sum of positive squares in 4 ways, for example, as 212022721 + 901200400 = 14561^2 + 30020^2 .

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 1113223121 - 2¹⁴ = 1113206737 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1113223121.

It is not an unprimeable number, because it can be changed into a prime (1113223123) 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, 50951 + ... + 69443.

It is an arithmetic number, because the mean of its divisors is an integer number (147387933).

Almost surely, 2^1113223121 is an apocalyptic number.

It is an amenable number.

1113223121 is a deficient number, since it is larger than the sum of its proper divisors (65880343).

1113223121 is a wasteful number, since it uses less digits than its factorization.

1113223121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22051.

The product of its digits is 72, while the sum is 17.

The square root of 1113223121 is about 33364.9984414806. The cubic root of 1113223121 is about 1036.4000038655.

Adding to 1113223121 its reverse (1213223111), we get a palindrome (2326446232).

The spelling of 1113223121 in words is "one billion, one hundred thirteen million, two hundred twenty-three thousand, one hundred twenty-one".