33121221001 has 16 divisors (see below), whose sum is σ = 39003327360. Its totient is φ = 27807915520.

The previous prime is 33121220971. The next prime is 33121221013. The reversal of 33121221001 is 10012212133.

It is not a de Polignac number, because 33121221001 - 2¹¹ = 33121218953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33121221071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2249800 + ... + 2264473.

It is an arithmetic number, because the mean of its divisors is an integer number (2437707960).

Almost surely, 2^33121221001 is an apocalyptic number.

It is an amenable number.

33121221001 is a deficient number, since it is larger than the sum of its proper divisors (5882106359).

33121221001 is a wasteful number, since it uses less digits than its factorization.

33121221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4514336.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 33121221001 its reverse (10012212133), we get a palindrome (43133433134).

The spelling of 33121221001 in words is "thirty-three billion, one hundred twenty-one million, two hundred twenty-one thousand, one".