221011033 has 8 divisors (see below), whose sum is σ = 239720040. Its totient is φ = 202936320.

The previous prime is 221010971. The next prime is 221011057. The reversal of 221011033 is 330110122.

221011033 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 399424 + 220611609 = 632^2 + 14853^2 .

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 221011033 - 2²¹ = 218913881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221011073) 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, 157848 + ... + 159241.

It is an arithmetic number, because the mean of its divisors is an integer number (29965005).

Almost surely, 2^221011033 is an apocalyptic number.

It is an amenable number.

221011033 is a deficient number, since it is larger than the sum of its proper divisors (18709007).

221011033 is a wasteful number, since it uses less digits than its factorization.

221011033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317147.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 221011033 is about 14866.4398226341. The cubic root of 221011033 is about 604.6044205041.

Adding to 221011033 its reverse (330110122), we get a palindrome (551121155).

The spelling of 221011033 in words is "two hundred twenty-one million, eleven thousand, thirty-three".