2012321101221 has 6 divisors (see below), whose sum is σ = 2906686035110. Its totient is φ = 1341547400808.

The previous prime is 2012321101201. The next prime is 2012321101223. The reversal of 2012321101221 is 1221011232102.

2012321101221 is a `hidden beast` number, since 20 + 1 + 2 + 321 + 101 + 221 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1856572478721 + 155748622500 = 1362561^2 + 394650^2 .

It is not a de Polignac number, because 2012321101221 - 2³⁹ = 1462565287333 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2012321101194 and 2012321101203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2012321101223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 111795616726 + ... + 111795616743.

Almost surely, 2^{2012321101221} is an apocalyptic number.

It is an amenable number.

2012321101221 is a deficient number, since it is larger than the sum of its proper divisors (894364933889).

2012321101221 is a wasteful number, since it uses less digits than its factorization.

2012321101221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223591233475 (or 223591233472 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 2012321101221 its reverse (1221011232102), we get a palindrome (3233332333323).

The spelling of 2012321101221 in words is "two trillion, twelve billion, three hundred twenty-one million, one hundred one thousand, two hundred twenty-one".