1113021221 has 8 divisors (see below), whose sum is σ = 1250753280. Its totient is φ = 982734192.

The previous prime is 1113021191. The next prime is 1113021223. The reversal of 1113021221 is 1221203111.

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 1113021221 - 2³⁰ = 39279397 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 = 1113021196 and 1113021205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1113021223) 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, 1860941 + ... + 1861538.

It is an arithmetic number, because the mean of its divisors is an integer number (156344160).

Almost surely, 2^1113021221 is an apocalyptic number.

It is an amenable number.

1113021221 is a deficient number, since it is larger than the sum of its proper divisors (137732059).

1113021221 is a wasteful number, since it uses less digits than its factorization.

1113021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3722515.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1113021221 is about 33361.9726784853. The cubic root of 1113021221 is about 1036.3373444254.

Adding to 1113021221 its reverse (1221203111), we get a palindrome (2334224332).

The spelling of 1113021221 in words is "one billion, one hundred thirteen million, twenty-one thousand, two hundred twenty-one".