21235030207 has 2 divisors, whose sum is σ = 21235030208. Its totient is φ = 21235030206.

The previous prime is 21235030153. The next prime is 21235030231. The reversal of 21235030207 is 70203053212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21235030207 - 2³¹ = 19087546559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21235030237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10617515103 + 10617515104.

It is an arithmetic number, because the mean of its divisors is an integer number (10617515104).

Almost surely, 2^21235030207 is an apocalyptic number.

21235030207 is a deficient number, since it is larger than the sum of its proper divisors (1).

21235030207 is an equidigital number, since it uses as much as digits as its factorization.

21235030207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 25.

Adding to 21235030207 its reverse (70203053212), we get a palindrome (91438083419).

The spelling of 21235030207 in words is "twenty-one billion, two hundred thirty-five million, thirty thousand, two hundred seven".