21445134024371 has 2 divisors, whose sum is σ = 21445134024372. Its totient is φ = 21445134024370.

The previous prime is 21445134024329. The next prime is 21445134024373. The reversal of 21445134024371 is 17342043154412.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21445134024371 - 2³⁴ = 21427954155187 is a prime.

Together with 21445134024373, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (21445134024373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10722567012185 + 10722567012186.

It is an arithmetic number, because the mean of its divisors is an integer number (10722567012186).

Almost surely, 2^{21445134024371} is an apocalyptic number.

21445134024371 is a deficient number, since it is larger than the sum of its proper divisors (1).

21445134024371 is an equidigital number, since it uses as much as digits as its factorization.

21445134024371 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 322560, while the sum is 41.

Adding to 21445134024371 its reverse (17342043154412), we get a palindrome (38787177178783).

The spelling of 21445134024371 in words is "twenty-one trillion, four hundred forty-five billion, one hundred thirty-four million, twenty-four thousand, three hundred seventy-one".