21213319207 has 2 divisors, whose sum is σ = 21213319208. Its totient is φ = 21213319206.

The previous prime is 21213319201. The next prime is 21213319213. The reversal of 21213319207 is 70291331212.

It is a balanced prime because it is at equal distance from previous prime (21213319201) and next prime (21213319213).

It is a cyclic number.

It is not a de Polignac number, because 21213319207 - 2²³ = 21204930599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21213319201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10606659603 + 10606659604.

It is an arithmetic number, because the mean of its divisors is an integer number (10606659604).

Almost surely, 2^21213319207 is an apocalyptic number.

21213319207 is a deficient number, since it is larger than the sum of its proper divisors (1).

21213319207 is an equidigital number, since it uses as much as digits as its factorization.

21213319207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 31.

The spelling of 21213319207 in words is "twenty-one billion, two hundred thirteen million, three hundred nineteen thousand, two hundred seven".