33122020221 has 6 divisors (see below), whose sum is σ = 47842918110. Its totient is φ = 22081346808.

The previous prime is 33122020187. The next prime is 33122020223. The reversal of 33122020221 is 12202022133.

It can be written as a sum of positive squares in only one way, i.e., 32035988196 + 1086032025 = 178986^2 + 32955^2 .

It is not a de Polignac number, because 33122020221 - 2¹¹ = 33122018173 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 33122020194 and 33122020203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33122020223) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1840112226 + ... + 1840112243.

It is an arithmetic number, because the mean of its divisors is an integer number (7973819685).

Almost surely, 2^33122020221 is an apocalyptic number.

It is an amenable number.

33122020221 is a deficient number, since it is larger than the sum of its proper divisors (14720897889).

33122020221 is a wasteful number, since it uses less digits than its factorization.

33122020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3680224475 (or 3680224472 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 33122020221 its reverse (12202022133), we get a palindrome (45324042354).

The spelling of 33122020221 in words is "thirty-three billion, one hundred twenty-two million, twenty thousand, two hundred twenty-one".