221100100033212 has 72 divisors (see below), whose sum is σ = 575253119300496. Its totient is φ = 71551229762304.

The previous prime is 221100100033207. The next prime is 221100100033229. The reversal of 221100100033212 is 212330001001122.

221100100033212 is a `hidden beast` number, since 221 + 1 + 0 + 0 + 100 + 0 + 332 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 181000758 + ... + 182218205.

Almost surely, 2^{221100100033212} is an apocalyptic number.

It is an amenable number.

221100100033212 is an abundant number, since it is smaller than the sum of its proper divisors (354153019267284).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221100100033212 is a wasteful number, since it uses less digits than its factorization.

221100100033212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363219467 (or 363219462 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 221100100033212 its reverse (212330001001122), we get a palindrome (433430101034334).

The spelling of 221100100033212 in words is "two hundred twenty-one trillion, one hundred billion, one hundred million, thirty-three thousand, two hundred twelve".