21241225519 has 2 divisors, whose sum is σ = 21241225520. Its totient is φ = 21241225518.

The previous prime is 21241225493. The next prime is 21241225547. The reversal of 21241225519 is 91552214212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21241225519 - 2⁵ = 21241225487 is a prime.

It is a super-2 number, since 2×21241225519² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21241225559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10620612759 + 10620612760.

It is an arithmetic number, because the mean of its divisors is an integer number (10620612760).

Almost surely, 2^21241225519 is an apocalyptic number.

21241225519 is a deficient number, since it is larger than the sum of its proper divisors (1).

21241225519 is an equidigital number, since it uses as much as digits as its factorization.

21241225519 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14400, while the sum is 34.

The spelling of 21241225519 in words is "twenty-one billion, two hundred forty-one million, two hundred twenty-five thousand, five hundred nineteen".