21211012220143 has 2 divisors, whose sum is σ = 21211012220144. Its totient is φ = 21211012220142.

The previous prime is 21211012220087. The next prime is 21211012220149. The reversal of 21211012220143 is 34102221011212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21211012220143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21211012220149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605506110071 + 10605506110072.

It is an arithmetic number, because the mean of its divisors is an integer number (10605506110072).

Almost surely, 2^{21211012220143} is an apocalyptic number.

21211012220143 is a deficient number, since it is larger than the sum of its proper divisors (1).

21211012220143 is an equidigital number, since it uses as much as digits as its factorization.

21211012220143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 21211012220143 its reverse (34102221011212), we get a palindrome (55313233231355).

The spelling of 21211012220143 in words is "twenty-one trillion, two hundred eleven billion, twelve million, two hundred twenty thousand, one hundred forty-three".