33103012221 has 24 divisors (see below), whose sum is σ = 50635611000. Its totient is φ = 20767451136.

The previous prime is 33103012207. The next prime is 33103012253. The reversal of 33103012221 is 12221030133.

It can be written as a sum of positive squares in 4 ways, for example, as 11195756100 + 21907256121 = 105810^2 + 148011^2 .

It is not a de Polignac number, because 33103012221 - 2²¹ = 33100915069 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 33103012194 and 33103012203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33103012291) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1480501 + ... + 1502693.

It is an arithmetic number, because the mean of its divisors is an integer number (2109817125).

Almost surely, 2^33103012221 is an apocalyptic number.

It is an amenable number.

33103012221 is a deficient number, since it is larger than the sum of its proper divisors (17532598779).

33103012221 is a wasteful number, since it uses less digits than its factorization.

33103012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31965 (or 31962 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 33103012221 its reverse (12221030133), we get a palindrome (45324042354).

The spelling of 33103012221 in words is "thirty-three billion, one hundred three million, twelve thousand, two hundred twenty-one".