221102011012212 has 72 divisors (see below), whose sum is σ = 609713008413600. Its totient is φ = 66999789299520.

The previous prime is 221102011012123. The next prime is 221102011012219. The reversal of 221102011012212 is 212210110201122.

221102011012212 is a `hidden beast` number, since 221 + 10 + 201 + 10 + 1 + 221 + 2 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221102011012219) by changing a digit.

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, 29373078 + ... + 36124530.

Almost surely, 2^{221102011012212} is an apocalyptic number.

221102011012212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221102011012212 is an abundant number, since it is smaller than the sum of its proper divisors (388610997401388).

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

221102011012212 is a wasteful number, since it uses less digits than its factorization.

221102011012212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6834173 (or 6834168 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 221102011012212 its reverse (212210110201122), we get a palindrome (433312121213334).

The spelling of 221102011012212 in words is "two hundred twenty-one trillion, one hundred two billion, eleven million, twelve thousand, two hundred twelve".