20012011212071 has 2 divisors, whose sum is σ = 20012011212072. Its totient is φ = 20012011212070.

The previous prime is 20012011212047. The next prime is 20012011212139. The reversal of 20012011212071 is 17021211021002.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20012011212071 is a prime.

It is a super-2 number, since 2×20012011212071² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20012013212071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006005606035 + 10006005606036.

It is an arithmetic number, because the mean of its divisors is an integer number (10006005606036).

Almost surely, 2^{20012011212071} is an apocalyptic number.

20012011212071 is a deficient number, since it is larger than the sum of its proper divisors (1).

20012011212071 is an equidigital number, since it uses as much as digits as its factorization.

20012011212071 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 20.

Adding to 20012011212071 its reverse (17021211021002), we get a palindrome (37033222233073).

The spelling of 20012011212071 in words is "twenty trillion, twelve billion, eleven million, two hundred twelve thousand, seventy-one".