33100000221 has 16 divisors (see below), whose sum is σ = 45515300864. Its totient is φ = 21383765424.

The previous prime is 33100000211. The next prime is 33100000223. The reversal of 33100000221 is 12200000133.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-33100000221 is a prime.

It is a super-2 number, since 2×33100000221² (a number of 22 digits) contains 22 as substring.

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 = 33100000197 and 33100000206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33100000223) 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, 993811 + ... + 1026576.

It is an arithmetic number, because the mean of its divisors is an integer number (2844706304).

Almost surely, 2^33100000221 is an apocalyptic number.

It is an amenable number.

33100000221 is a deficient number, since it is larger than the sum of its proper divisors (12415300643).

33100000221 is a wasteful number, since it uses less digits than its factorization.

33100000221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2020560.

The product of its (nonzero) digits is 36, while the sum is 12.

Adding to 33100000221 its reverse (12200000133), we get a palindrome (45300000354).

The spelling of 33100000221 in words is "thirty-three billion, one hundred million, two hundred twenty-one", and thus it is an aban number.