221222021012012 has 12 divisors (see below), whose sum is σ = 387338815386096. Its totient is φ = 110553788044560.

The previous prime is 221222021012011. The next prime is 221222021012033. The reversal of 221222021012012 is 210210120222122.

221222021012012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (221222021012011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14305606664 + ... + 14305622127.

It is an arithmetic number, because the mean of its divisors is an integer number (32278234615508).

Almost surely, 2^{221222021012012} is an apocalyptic number.

It is an amenable number.

221222021012012 is a deficient number, since it is larger than the sum of its proper divisors (166116794374084).

221222021012012 is a wasteful number, since it uses less digits than its factorization.

221222021012012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28611230728 (or 28611230726 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 221222021012012 its reverse (210210120222122), we get a palindrome (431432141234134).

The spelling of 221222021012012 in words is "two hundred twenty-one trillion, two hundred twenty-two billion, twenty-one million, twelve thousand, twelve".