20112010112221 has 4 divisors (see below), whose sum is σ = 20116328779132. Its totient is φ = 20107691445312.

The previous prime is 20112010112213. The next prime is 20112010112263. The reversal of 20112010112221 is 12221101021102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4166962846596 + 15945047265625 = 2041314^2 + 3993125^2 .

It is a cyclic number.

It is not a de Polignac number, because 20112010112221 - 2³ = 20112010112213 is a prime.

It is a super-2 number, since 2×20112010112221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20112010112195 and 20112010112204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112010112021) 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, 2159326470 + ... + 2159335783.

It is an arithmetic number, because the mean of its divisors is an integer number (5029082194783).

Almost surely, 2^{20112010112221} is an apocalyptic number.

It is an amenable number.

20112010112221 is a deficient number, since it is larger than the sum of its proper divisors (4318666911).

20112010112221 is an equidigital number, since it uses as much as digits as its factorization.

20112010112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4318666910.

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

Adding to 20112010112221 its reverse (12221101021102), we get a palindrome (32333111133323).

The spelling of 20112010112221 in words is "twenty trillion, one hundred twelve billion, ten million, one hundred twelve thousand, two hundred twenty-one".