2020221212081 has 2 divisors, whose sum is σ = 2020221212082. Its totient is φ = 2020221212080.

The previous prime is 2020221212069. The next prime is 2020221212083. The reversal of 2020221212081 is 1802121220202.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1979060917681 + 41160294400 = 1406791^2 + 202880^2 .

It is a cyclic number.

It is not a de Polignac number, because 2020221212081 - 2¹⁴ = 2020221195697 is a prime.

It is a super-2 number, since 2×2020221212081² (a number of 25 digits) contains 22 as substring.

Together with 2020221212083, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2020221212083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010110606040 + 1010110606041.

It is an arithmetic number, because the mean of its divisors is an integer number (1010110606041).

Almost surely, 2^{2020221212081} is an apocalyptic number.

It is an amenable number.

2020221212081 is a deficient number, since it is larger than the sum of its proper divisors (1).

2020221212081 is an equidigital number, since it uses as much as digits as its factorization.

2020221212081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 2020221212081 its reverse (1802121220202), we get a palindrome (3822342432283).

The spelling of 2020221212081 in words is "two trillion, twenty billion, two hundred twenty-one million, two hundred twelve thousand, eighty-one".