20211211002071 has 2 divisors, whose sum is σ = 20211211002072. Its totient is φ = 20211211002070.

The previous prime is 20211211002053. The next prime is 20211211002113. The reversal of 20211211002071 is 17020011211202.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20211211002071 - 2¹⁴ = 20211210985687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20211211002271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105605501035 + 10105605501036.

It is an arithmetic number, because the mean of its divisors is an integer number (10105605501036).

Almost surely, 2^{20211211002071} is an apocalyptic number.

20211211002071 is a deficient number, since it is larger than the sum of its proper divisors (1).

20211211002071 is an equidigital number, since it uses as much as digits as its factorization.

20211211002071 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 20211211002071 its reverse (17020011211202), we get a palindrome (37231222213273).

The spelling of 20211211002071 in words is "twenty trillion, two hundred eleven billion, two hundred eleven million, two thousand, seventy-one".