20120101112221 has 16 divisors (see below), whose sum is σ = 22321481310720. Its totient is φ = 17980774812720.

The previous prime is 20120101112179. The next prime is 20120101112227. The reversal of 20120101112221 is 12221110102102.

It is a cyclic number.

It is not a de Polignac number, because 20120101112221 - 2⁹ = 20120101111709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20120101112195 and 20120101112204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20120101112227) 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 15 ways as a sum of consecutive naturals, for example, 91543966 + ... + 91763488.

It is an arithmetic number, because the mean of its divisors is an integer number (1395092581920).

Almost surely, 2^{20120101112221} is an apocalyptic number.

It is an amenable number.

20120101112221 is a deficient number, since it is larger than the sum of its proper divisors (2201380198499).

20120101112221 is a wasteful number, since it uses less digits than its factorization.

20120101112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360816.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 20120101112221 its reverse (12221110102102), we get a palindrome (32341211214323).

The spelling of 20120101112221 in words is "twenty trillion, one hundred twenty billion, one hundred one million, one hundred twelve thousand, two hundred twenty-one".