20201342221121 has 4 divisors (see below), whose sum is σ = 20203757791152. Its totient is φ = 20198926651092.

The previous prime is 20201342221097. The next prime is 20201342221189. The reversal of 20201342221121 is 12112224310202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20201342221121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20201342220121) 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, 1207772471 + ... + 1207789196.

It is an arithmetic number, because the mean of its divisors is an integer number (5050939447788).

Almost surely, 2^{20201342221121} is an apocalyptic number.

It is an amenable number.

20201342221121 is a deficient number, since it is larger than the sum of its proper divisors (2415570031).

20201342221121 is an equidigital number, since it uses as much as digits as its factorization.

20201342221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2415570030.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 20201342221121 its reverse (12112224310202), we get a palindrome (32313566531323).

The spelling of 20201342221121 in words is "twenty trillion, two hundred one billion, three hundred forty-two million, two hundred twenty-one thousand, one hundred twenty-one".