33011221001 has 4 divisors (see below), whose sum is σ = 36012241104. Its totient is φ = 30010200900.

The previous prime is 33011220989. The next prime is 33011221079. The reversal of 33011221001 is 10012211033.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10012211033 = 11 ⋅910201003.

It is a cyclic number.

It is not a de Polignac number, because 33011221001 - 2⁶ = 33011220937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33011221081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1500510035 + ... + 1500510056.

It is an arithmetic number, because the mean of its divisors is an integer number (9003060276).

Almost surely, 2^33011221001 is an apocalyptic number.

It is an amenable number.

33011221001 is a deficient number, since it is larger than the sum of its proper divisors (3001020103).

33011221001 is a wasteful number, since it uses less digits than its factorization.

33011221001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3001020102.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 33011221001 its reverse (10012211033), we get a palindrome (43023432034).

The spelling of 33011221001 in words is "thirty-three billion, eleven million, two hundred twenty-one thousand, one".