21202000221043 has 2 divisors, whose sum is σ = 21202000221044. Its totient is φ = 21202000221042.

The previous prime is 21202000221029. The next prime is 21202000221067. The reversal of 21202000221043 is 34012200020212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21202000221043 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21202000221043.

It is not a weakly prime, because it can be changed into another prime (21202000221343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601000110521 + 10601000110522.

It is an arithmetic number, because the mean of its divisors is an integer number (10601000110522).

Almost surely, 2^{21202000221043} is an apocalyptic number.

21202000221043 is a deficient number, since it is larger than the sum of its proper divisors (1).

21202000221043 is an equidigital number, since it uses as much as digits as its factorization.

21202000221043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 21202000221043 its reverse (34012200020212), we get a palindrome (55214200241255).

The spelling of 21202000221043 in words is "twenty-one trillion, two hundred two billion, two hundred twenty-one thousand, forty-three".