20021220201071 has 2 divisors, whose sum is σ = 20021220201072. Its totient is φ = 20021220201070.

The previous prime is 20021220201043. The next prime is 20021220201119. The reversal of 20021220201071 is 17010202212002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20021220201071 - 2⁴² = 15623173689967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20021220201011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010610100535 + 10010610100536.

It is an arithmetic number, because the mean of its divisors is an integer number (10010610100536).

Almost surely, 2^{20021220201071} is an apocalyptic number.

20021220201071 is a deficient number, since it is larger than the sum of its proper divisors (1).

20021220201071 is an equidigital number, since it uses as much as digits as its factorization.

20021220201071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 20.

Adding to 20021220201071 its reverse (17010202212002), we get a palindrome (37031422413073).

The spelling of 20021220201071 in words is "twenty trillion, twenty-one billion, two hundred twenty million, two hundred one thousand, seventy-one".