221102033 has 4 divisors (see below), whose sum is σ = 221232228. Its totient is φ = 220971840.

The previous prime is 221102027. The next prime is 221102039. The reversal of 221102033 is 330201122.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 330201122 = 2 ⋅165100561.

It is an interprime number because it is at equal distance from previous prime (221102027) and next prime (221102039).

It can be written as a sum of positive squares in 2 ways, for example, as 193989184 + 27112849 = 13928^2 + 5207^2 .

It is a cyclic number.

It is not a de Polignac number, because 221102033 - 2¹⁴ = 221085649 is a prime.

It is a super-2 number, since 2×221102033² = 97772217993466178, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221101999 and 221102017.

It is not an unprimeable number, because it can be changed into a prime (221102039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62516 + ... + 65957.

It is an arithmetic number, because the mean of its divisors is an integer number (55308057).

Almost surely, 2^221102033 is an apocalyptic number.

It is an amenable number.

221102033 is a deficient number, since it is larger than the sum of its proper divisors (130195).

221102033 is a wasteful number, since it uses less digits than its factorization.

221102033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130194.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 221102033 is about 14869.5000924712. The cubic root of 221102033 is about 604.6873898955.

Adding to 221102033 its reverse (330201122), we get a palindrome (551303155).

The spelling of 221102033 in words is "two hundred twenty-one million, one hundred two thousand, thirty-three".