10212767209 has 2 divisors, whose sum is σ = 10212767210. Its totient is φ = 10212767208.

The previous prime is 10212767189. The next prime is 10212767237. The reversal of 10212767209 is 90276721201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6473811600 + 3738955609 = 80460^2 + 61147^2 .

It is a cyclic number.

It is not a de Polignac number, because 10212767209 - 2²³ = 10204378601 is a prime.

It is a super-2 number, since 2×10212767209² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10212767239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5106383604 + 5106383605.

It is an arithmetic number, because the mean of its divisors is an integer number (5106383605).

Almost surely, 2^10212767209 is an apocalyptic number.

It is an amenable number.

10212767209 is a deficient number, since it is larger than the sum of its proper divisors (1).

10212767209 is an equidigital number, since it uses as much as digits as its factorization.

10212767209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 37.

The spelling of 10212767209 in words is "ten billion, two hundred twelve million, seven hundred sixty-seven thousand, two hundred nine".