33221233210021 has 8 divisors (see below), whose sum is σ = 33240586218840. Its totient is φ = 33201882074112.

The previous prime is 33221233209919. The next prime is 33221233210069. The reversal of 33221233210021 is 12001233212233.

It can be written as a sum of positive squares in 4 ways, for example, as 10393621479396 + 22827611730625 = 3223914^2 + 4777825^2 .

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 33221233210021 - 2¹⁷ = 33221233078949 is a prime.

It is a super-2 number, since 2×33221233210021² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33221233217021) 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, 35835681 + ... + 36751033.

It is an arithmetic number, because the mean of its divisors is an integer number (4155073277355).

Almost surely, 2^{33221233210021} is an apocalyptic number.

It is an amenable number.

33221233210021 is a deficient number, since it is larger than the sum of its proper divisors (19353008819).

33221233210021 is a wasteful number, since it uses less digits than its factorization.

33221233210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 936455.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 33221233210021 its reverse (12001233212233), we get a palindrome (45222466422254).

The spelling of 33221233210021 in words is "thirty-three trillion, two hundred twenty-one billion, two hundred thirty-three million, two hundred ten thousand, twenty-one".