21241651307 has 2 divisors, whose sum is σ = 21241651308. Its totient is φ = 21241651306.

The previous prime is 21241651253. The next prime is 21241651349. The reversal of 21241651307 is 70315614212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21241651307 - 2¹⁴ = 21241634923 is a prime.

It is not a weakly prime, because it can be changed into another prime (21241651397) 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, 10620825653 + 10620825654.

It is an arithmetic number, because the mean of its divisors is an integer number (10620825654).

Almost surely, 2^21241651307 is an apocalyptic number.

21241651307 is a deficient number, since it is larger than the sum of its proper divisors (1).

21241651307 is an equidigital number, since it uses as much as digits as its factorization.

21241651307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 32.

The spelling of 21241651307 in words is "twenty-one billion, two hundred forty-one million, six hundred fifty-one thousand, three hundred seven".