1133220021 has 32 divisors (see below), whose sum is σ = 1626124800. Its totient is φ = 699814080.

The previous prime is 1133219993. The next prime is 1133220041. The reversal of 1133220021 is 1200223311.

It is not a de Polignac number, because 1133220021 - 2¹¹ = 1133217973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1133220041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 708795 + ... + 710391.

It is an arithmetic number, because the mean of its divisors is an integer number (50816400).

Almost surely, 2^1133220021 is an apocalyptic number.

It is an amenable number.

1133220021 is a deficient number, since it is larger than the sum of its proper divisors (492904779).

1133220021 is a wasteful number, since it uses less digits than its factorization.

1133220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1889.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1133220021 is about 33663.3334802126. Note that the first 3 decimals coincide. The cubic root of 1133220021 is about 1042.5688532870.

Adding to 1133220021 its reverse (1200223311), we get a palindrome (2333443332).

The spelling of 1133220021 in words is "one billion, one hundred thirty-three million, two hundred twenty thousand, twenty-one".