21200111022043 has 2 divisors, whose sum is σ = 21200111022044. Its totient is φ = 21200111022042.

The previous prime is 21200111022037. The next prime is 21200111022091. The reversal of 21200111022043 is 34022011100212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21200111022043 - 2⁵ = 21200111022011 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21200111022043.

It is not a weakly prime, because it can be changed into another prime (21200111022443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600055511021 + 10600055511022.

It is an arithmetic number, because the mean of its divisors is an integer number (10600055511022).

Almost surely, 2^{21200111022043} is an apocalyptic number.

21200111022043 is a deficient number, since it is larger than the sum of its proper divisors (1).

21200111022043 is an equidigital number, since it uses as much as digits as its factorization.

21200111022043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21200111022043 its reverse (34022011100212), we get a palindrome (55222122122255).

The spelling of 21200111022043 in words is "twenty-one trillion, two hundred billion, one hundred eleven million, twenty-two thousand, forty-three".