33012202221 has 6 divisors (see below), whose sum is σ = 47684292110. Its totient is φ = 22008134808.

The previous prime is 33012202217. The next prime is 33012202241. The reversal of 33012202221 is 12220221033.

It can be written as a sum of positive squares in only one way, i.e., 31814073225 + 1198128996 = 178365^2 + 34614^2 .

It is not a de Polignac number, because 33012202221 - 2² = 33012202217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 33012202194 and 33012202203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33012202211) 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, 1834011226 + ... + 1834011243.

Almost surely, 2^33012202221 is an apocalyptic number.

It is an amenable number.

33012202221 is a deficient number, since it is larger than the sum of its proper divisors (14672089889).

33012202221 is a wasteful number, since it uses less digits than its factorization.

33012202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3668022475 (or 3668022472 counting only the distinct ones).

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

Adding to 33012202221 its reverse (12220221033), we get a palindrome (45232423254).

The spelling of 33012202221 in words is "thirty-three billion, twelve million, two hundred two thousand, two hundred twenty-one".