1113001221 has 8 divisors (see below), whose sum is σ = 1484752000. Its totient is φ = 741625632.

The previous prime is 1113001189. The next prime is 1113001231. The reversal of 1113001221 is 1221003111.

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

It is not a de Polignac number, because 1113001221 - 2⁵ = 1113001189 is a prime.

It is a Duffinian number.

1113001221 is a modest number, since divided by 1221 gives 1113 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 1113001197 and 1113001206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1113001231) 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, 86800 + ... + 98793.

It is an arithmetic number, because the mean of its divisors is an integer number (185594000).

Almost surely, 2^1113001221 is an apocalyptic number.

It is an amenable number.

1113001221 is a deficient number, since it is larger than the sum of its proper divisors (371750779).

1113001221 is a wasteful number, since it uses less digits than its factorization.

1113001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187595.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 1113001221 is about 33361.6729346716. The cubic root of 1113001221 is about 1036.3311370352.

Adding to 1113001221 its reverse (1221003111), we get a palindrome (2334004332).

The spelling of 1113001221 in words is "one billion, one hundred thirteen million, one thousand, two hundred twenty-one".