20112000012221 has 4 divisors (see below), whose sum is σ = 21659076936252. Its totient is φ = 18564923088192.

The previous prime is 20112000012193. The next prime is 20112000012239. The reversal of 20112000012221 is 12221000021102.

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 4162048812100 + 15949951200121 = 2040110^2 + 3993739^2 .

It is not a de Polignac number, because 20112000012221 - 2³⁰ = 20110926270397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20112000012196 and 20112000012205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112000012821) 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, 773538461996 + ... + 773538462021.

It is an arithmetic number, because the mean of its divisors is an integer number (5414769234063).

Almost surely, 2^{20112000012221} is an apocalyptic number.

It is an amenable number.

20112000012221 is a deficient number, since it is larger than the sum of its proper divisors (1547076924031).

20112000012221 is a wasteful number, since it uses less digits than its factorization.

20112000012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1547076924030.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20112000012221 its reverse (12221000021102), we get a palindrome (32333000033323).

The spelling of 20112000012221 in words is "twenty trillion, one hundred twelve billion, twelve thousand, two hundred twenty-one".