21224320042147 has 2 divisors, whose sum is σ = 21224320042148. Its totient is φ = 21224320042146.

The previous prime is 21224320042091. The next prime is 21224320042169. The reversal of 21224320042147 is 74124002342212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21224320042147 - 2¹⁹ = 21224319517859 is a prime.

It is a super-2 number, since 2×21224320042147² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21224320042747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10612160021073 + 10612160021074.

It is an arithmetic number, because the mean of its divisors is an integer number (10612160021074).

Almost surely, 2^{21224320042147} is an apocalyptic number.

21224320042147 is a deficient number, since it is larger than the sum of its proper divisors (1).

21224320042147 is an equidigital number, since it uses as much as digits as its factorization.

21224320042147 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43008, while the sum is 34.

Adding to 21224320042147 its reverse (74124002342212), we get a palindrome (95348322384359).

The spelling of 21224320042147 in words is "twenty-one trillion, two hundred twenty-four billion, three hundred twenty million, forty-two thousand, one hundred forty-seven".