221021112110012 has 24 divisors (see below), whose sum is σ = 387065039975040. Its totient is φ = 110431116477360.

The previous prime is 221021112110011. The next prime is 221021112110081. The reversal of 221021112110012 is 210011211120122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221021112110011) 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, 54169337 + ... + 58106447.

It is an arithmetic number, because the mean of its divisors is an integer number (16127709998960).

Almost surely, 2^{221021112110012} is an apocalyptic number.

It is an amenable number.

221021112110012 is a deficient number, since it is larger than the sum of its proper divisors (166043927865028).

221021112110012 is a wasteful number, since it uses less digits than its factorization.

221021112110012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3947201 (or 3947199 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 221021112110012 its reverse (210011211120122), we get a palindrome (431032323230134).

The spelling of 221021112110012 in words is "two hundred twenty-one trillion, twenty-one billion, one hundred twelve million, one hundred ten thousand, twelve".