20012220071 has 2 divisors, whose sum is σ = 20012220072. Its totient is φ = 20012220070.

The previous prime is 20012220049. The next prime is 20012220103. The reversal of 20012220071 is 17002221002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20012220071 - 2³⁴ = 2832350887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20012220001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006110035 + 10006110036.

It is an arithmetic number, because the mean of its divisors is an integer number (10006110036).

Almost surely, 2^20012220071 is an apocalyptic number.

20012220071 is a deficient number, since it is larger than the sum of its proper divisors (1).

20012220071 is an equidigital number, since it uses as much as digits as its factorization.

20012220071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112, while the sum is 17.

Adding to 20012220071 its reverse (17002221002), we get a palindrome (37014441073).

The spelling of 20012220071 in words is "twenty billion, twelve million, two hundred twenty thousand, seventy-one".