21034313207 has 2 divisors, whose sum is σ = 21034313208. Its totient is φ = 21034313206.

The previous prime is 21034313173. The next prime is 21034313219. The reversal of 21034313207 is 70231343012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21034313207 - 2⁶ = 21034313143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21034312207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10517156603 + 10517156604.

It is an arithmetic number, because the mean of its divisors is an integer number (10517156604).

Almost surely, 2^21034313207 is an apocalyptic number.

21034313207 is a deficient number, since it is larger than the sum of its proper divisors (1).

21034313207 is an equidigital number, since it uses as much as digits as its factorization.

21034313207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 26.

Adding to 21034313207 its reverse (70231343012), we get a palindrome (91265656219).

The spelling of 21034313207 in words is "twenty-one billion, thirty-four million, three hundred thirteen thousand, two hundred seven".