221120112021212 has 24 divisors (see below), whose sum is σ = 397860973847232. Its totient is φ = 107465449075200.

The previous prime is 221120112021079. The next prime is 221120112021217. The reversal of 221120112021212 is 212120211021122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221120112021217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2487581693 + ... + 2487670580.

It is an arithmetic number, because the mean of its divisors is an integer number (16577540576968).

Almost surely, 2^{221120112021212} is an apocalyptic number.

It is an amenable number.

221120112021212 is a deficient number, since it is larger than the sum of its proper divisors (176740861826020).

221120112021212 is a wasteful number, since it uses less digits than its factorization.

221120112021212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4975252589 (or 4975252587 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 221120112021212 its reverse (212120211021122), we get a palindrome (433240323042334).

The spelling of 221120112021212 in words is "two hundred twenty-one trillion, one hundred twenty billion, one hundred twelve million, twenty-one thousand, two hundred twelve".