20112202221121 has 2 divisors, whose sum is σ = 20112202221122. Its totient is φ = 20112202221120.

The previous prime is 20112202221031. The next prime is 20112202221127. The reversal of 20112202221121 is 12112220221102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19326257914896 + 785944306225 = 4396164^2 + 886535^2 .

It is a cyclic number.

It is not a de Polignac number, because 20112202221121 - 2³⁹ = 19562446407233 is a prime.

It is not a weakly prime, because it can be changed into another prime (20112202221127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10056101110560 + 10056101110561.

It is an arithmetic number, because the mean of its divisors is an integer number (10056101110561).

Almost surely, 2^{20112202221121} is an apocalyptic number.

It is an amenable number.

20112202221121 is a deficient number, since it is larger than the sum of its proper divisors (1).

20112202221121 is an equidigital number, since it uses as much as digits as its factorization.

20112202221121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 20112202221121 its reverse (12112220221102), we get a palindrome (32224422442223).

The spelling of 20112202221121 in words is "twenty trillion, one hundred twelve billion, two hundred two million, two hundred twenty-one thousand, one hundred twenty-one".