1120021221 has 8 divisors (see below), whose sum is σ = 1629121824. Its totient is φ = 678800720.

The previous prime is 1120021211. The next prime is 1120021247. The reversal of 1120021221 is 1221200211.

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 1120021221 - 2¹⁵ = 1119988453 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1120021197 and 1120021206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1120021211) 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, 16969986 + ... + 16970051.

It is an arithmetic number, because the mean of its divisors is an integer number (203640228).

Almost surely, 2^1120021221 is an apocalyptic number.

1120021221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1120021221 is a deficient number, since it is larger than the sum of its proper divisors (509100603).

1120021221 is a wasteful number, since it uses less digits than its factorization.

1120021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33940051.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1120021221 is about 33466.7181091902. The cubic root of 1120021221 is about 1038.5053792524.

Adding to 1120021221 its reverse (1221200211), we get a palindrome (2341221432).

The spelling of 1120021221 in words is "one billion, one hundred twenty million, twenty-one thousand, two hundred twenty-one".