20112201221121 has 8 divisors (see below), whose sum is σ = 29795853660960. Its totient is φ = 13408134147396.

The previous prime is 20112201221083. The next prime is 20112201221141. The reversal of 20112201221121 is 12112210221102.

20112201221121 is a `hidden beast` number, since 201 + 1 + 220 + 1 + 221 + 1 + 21 = 666.

It is not a de Polignac number, because 20112201221121 - 2¹⁷ = 20112201090049 is a prime.

It is a super-2 number, since 2×20112201221121² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20112201221094 and 20112201221103.

It is not an unprimeable number, because it can be changed into a prime (20112201221141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 372448170735 + ... + 372448170788.

It is an arithmetic number, because the mean of its divisors is an integer number (3724481707620).

Almost surely, 2^{20112201221121} is an apocalyptic number.

It is an amenable number.

20112201221121 is a deficient number, since it is larger than the sum of its proper divisors (9683652439839).

20112201221121 is an equidigital number, since it uses as much as digits as its factorization.

20112201221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 744896341532 (or 744896341526 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 20112201221121 its reverse (12112210221102), we get a palindrome (32224411442223).

The spelling of 20112201221121 in words is "twenty trillion, one hundred twelve billion, two hundred one million, two hundred twenty-one thousand, one hundred twenty-one".