33330112221 has 16 divisors (see below), whose sum is σ = 50792022144. Its totient is φ = 19044548544.

The previous prime is 33330112213. The next prime is 33330112223. The reversal of 33330112221 is 12221103333.

It is not a de Polignac number, because 33330112221 - 2³ = 33330112213 is a prime.

It is a super-2 number, since 2×33330112221² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33330112223) 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, 357535 + ... + 441011.

It is an arithmetic number, because the mean of its divisors is an integer number (3174501384).

Almost surely, 2^33330112221 is an apocalyptic number.

It is an amenable number.

33330112221 is a deficient number, since it is larger than the sum of its proper divisors (17461909923).

33330112221 is a wasteful number, since it uses less digits than its factorization.

33330112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102500.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 33330112221 its reverse (12221103333), we get a palindrome (45551215554).

The spelling of 33330112221 in words is "thirty-three billion, three hundred thirty million, one hundred twelve thousand, two hundred twenty-one".