33312230221 has 4 divisors (see below), whose sum is σ = 33312613852. Its totient is φ = 33311846592.

The previous prime is 33312230101. The next prime is 33312230227. The reversal of 33312230221 is 12203221333.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 19807466121 + 13504764100 = 140739^2 + 116210^2 .

It is a cyclic number.

It is not a de Polignac number, because 33312230221 - 2¹³ = 33312222029 is a prime.

It is a super-2 number, since 2×33312230221² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33312230192 and 33312230201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33312230227) 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, 7411 + ... + 258223.

It is an arithmetic number, because the mean of its divisors is an integer number (8328153463).

Almost surely, 2^33312230221 is an apocalyptic number.

It is an amenable number.

33312230221 is a deficient number, since it is larger than the sum of its proper divisors (383631).

33312230221 is a wasteful number, since it uses less digits than its factorization.

33312230221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383630.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 33312230221 its reverse (12203221333), we get a palindrome (45515451554).

The spelling of 33312230221 in words is "thirty-three billion, three hundred twelve million, two hundred thirty thousand, two hundred twenty-one".