21120222043 has 2 divisors, whose sum is σ = 21120222044. Its totient is φ = 21120222042.

The previous prime is 21120222037. The next prime is 21120222133. The reversal of 21120222043 is 34022202112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21120222043 - 2²⁵ = 21086667611 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21120222043.

It is not a weakly prime, because it can be changed into another prime (21120222023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10560111021 + 10560111022.

It is an arithmetic number, because the mean of its divisors is an integer number (10560111022).

Almost surely, 2^21120222043 is an apocalyptic number.

21120222043 is a deficient number, since it is larger than the sum of its proper divisors (1).

21120222043 is an equidigital number, since it uses as much as digits as its factorization.

21120222043 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 19.

Adding to 21120222043 its reverse (34022202112), we get a palindrome (55142424155).

The spelling of 21120222043 in words is "twenty-one billion, one hundred twenty million, two hundred twenty-two thousand, forty-three".