21224341351 has 2 divisors, whose sum is σ = 21224341352. Its totient is φ = 21224341350.

The previous prime is 21224341321. The next prime is 21224341387. The reversal of 21224341351 is 15314342212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21224341351 - 2¹⁷ = 21224210279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21224341321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10612170675 + 10612170676.

It is an arithmetic number, because the mean of its divisors is an integer number (10612170676).

Almost surely, 2^21224341351 is an apocalyptic number.

21224341351 is a deficient number, since it is larger than the sum of its proper divisors (1).

21224341351 is an equidigital number, since it uses as much as digits as its factorization.

21224341351 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 28.

Adding to 21224341351 its reverse (15314342212), we get a palindrome (36538683563).

The spelling of 21224341351 in words is "twenty-one billion, two hundred twenty-four million, three hundred forty-one thousand, three hundred fifty-one".