20211220063 has 2 divisors, whose sum is σ = 20211220064. Its totient is φ = 20211220062.

The previous prime is 20211220061. The next prime is 20211220147. The reversal of 20211220063 is 36002211202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20211220063 - 2¹ = 20211220061 is a prime.

Together with 20211220061, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20211220063.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20211220061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105610031 + 10105610032.

It is an arithmetic number, because the mean of its divisors is an integer number (10105610032).

Almost surely, 2^20211220063 is an apocalyptic number.

20211220063 is a deficient number, since it is larger than the sum of its proper divisors (1).

20211220063 is an equidigital number, since it uses as much as digits as its factorization.

20211220063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 20211220063 its reverse (36002211202), we get a palindrome (56213431265).

The spelling of 20211220063 in words is "twenty billion, two hundred eleven million, two hundred twenty thousand, sixty-three".