221010122121112 has 16 divisors (see below), whose sum is σ = 417656923695360. Its totient is φ = 109634942469024.

The previous prime is 221010122121097. The next prime is 221010122121119. The reversal of 221010122121112 is 211121221010122.

It is a happy number.

It is a super-4 number, since 4×221010122121112⁴ (a number of 58 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 221010122121112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221010122121119) 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 3 ways as a sum of consecutive naturals, for example, 108764822863 + ... + 108764824894.

It is an arithmetic number, because the mean of its divisors is an integer number (26103557730960).

Almost surely, 2^{221010122121112} is an apocalyptic number.

It is an amenable number.

221010122121112 is a deficient number, since it is larger than the sum of its proper divisors (196646801574248).

221010122121112 is a wasteful number, since it uses less digits than its factorization.

221010122121112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217529647890 (or 217529647886 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 221010122121112 its reverse (211121221010122), we get a palindrome (432131343131234).

The spelling of 221010122121112 in words is "two hundred twenty-one trillion, ten billion, one hundred twenty-two million, one hundred twenty-one thousand, one hundred twelve".