33331330221 has 24 divisors (see below), whose sum is σ = 51717059424. Its totient is φ = 19039295520.

The previous prime is 33331330199. The next prime is 33331330223. The reversal of 33331330221 is 12203313333.

It is not a de Polignac number, because 33331330221 - 2¹³ = 33331322029 is a prime.

It is a super-2 number, since 2×33331330221² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33331330191 and 33331330200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33331330223) 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, 361566 + ... + 444288.

It is an arithmetic number, because the mean of its divisors is an integer number (2154877476).

Almost surely, 2^33331330221 is an apocalyptic number.

It is an amenable number.

33331330221 is a deficient number, since it is larger than the sum of its proper divisors (18385729203).

33331330221 is a wasteful number, since it uses less digits than its factorization.

33331330221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85481 (or 85474 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 24.

Adding to 33331330221 its reverse (12203313333), we get a palindrome (45534643554).

The spelling of 33331330221 in words is "thirty-three billion, three hundred thirty-one million, three hundred thirty thousand, two hundred twenty-one".