20112130221121 has 2 divisors, whose sum is σ = 20112130221122. Its totient is φ = 20112130221120.

The previous prime is 20112130221119. The next prime is 20112130221173. The reversal of 20112130221121 is 12112203121102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20105036370496 + 7093850625 = 4483864^2 + 84225^2 .

It is a cyclic number.

It is not a de Polignac number, because 20112130221121 - 2¹ = 20112130221119 is a prime.

Together with 20112130221119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20112130221181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10056065110560 + 10056065110561.

It is an arithmetic number, because the mean of its divisors is an integer number (10056065110561).

Almost surely, 2^{20112130221121} is an apocalyptic number.

It is an amenable number.

20112130221121 is a deficient number, since it is larger than the sum of its proper divisors (1).

20112130221121 is an equidigital number, since it uses as much as digits as its factorization.

20112130221121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 20112130221121 its reverse (12112203121102), we get a palindrome (32224333342223).

The spelling of 20112130221121 in words is "twenty trillion, one hundred twelve billion, one hundred thirty million, two hundred twenty-one thousand, one hundred twenty-one".