21252335207 has 2 divisors, whose sum is σ = 21252335208. Its totient is φ = 21252335206.

The previous prime is 21252335201. The next prime is 21252335227. The reversal of 21252335207 is 70253325212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21252335207 - 2¹⁴ = 21252318823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21252335201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10626167603 + 10626167604.

It is an arithmetic number, because the mean of its divisors is an integer number (10626167604).

Almost surely, 2^21252335207 is an apocalyptic number.

21252335207 is a deficient number, since it is larger than the sum of its proper divisors (1).

21252335207 is an equidigital number, since it uses as much as digits as its factorization.

21252335207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25200, while the sum is 32.

It can be divided in two parts, 2125 and 2335207, that added together give a palindrome (2337332).

The spelling of 21252335207 in words is "twenty-one billion, two hundred fifty-two million, three hundred thirty-five thousand, two hundred seven".