221020221010012 has 6 divisors (see below), whose sum is σ = 386785386767528. Its totient is φ = 110510110505004.

The previous prime is 221020221009989. The next prime is 221020221010013. The reversal of 221020221010012 is 210010122020122.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221020221010013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27627527626248 + ... + 27627527626255.

Almost surely, 2^{221020221010012} is an apocalyptic number.

It is an amenable number.

221020221010012 is a deficient number, since it is larger than the sum of its proper divisors (165765165757516).

221020221010012 is a wasteful number, since it uses less digits than its factorization.

221020221010012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55255055252507 (or 55255055252505 counting only the distinct ones).

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

Adding to 221020221010012 its reverse (210010122020122), we get a palindrome (431030343030134).

The spelling of 221020221010012 in words is "two hundred twenty-one trillion, twenty billion, two hundred twenty-one million, ten thousand, twelve".