221001020122012 has 24 divisors (see below), whose sum is σ = 423561277162800. Its totient is φ = 100271649284736.

The previous prime is 221001020121971. The next prime is 221001020122033. The reversal of 221001020122012 is 210221020100122.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36017112337 + ... + 36017118472.

It is an arithmetic number, because the mean of its divisors is an integer number (17648386548450).

Almost surely, 2^{221001020122012} is an apocalyptic number.

It is an amenable number.

221001020122012 is a deficient number, since it is larger than the sum of its proper divisors (202560257040788).

221001020122012 is a wasteful number, since it uses less digits than its factorization.

221001020122012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72034230885 (or 72034230883 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 221001020122012 its reverse (210221020100122), we get a palindrome (431222040222134).

The spelling of 221001020122012 in words is "two hundred twenty-one trillion, one billion, twenty million, one hundred twenty-two thousand, twelve".