1012213309 has 2 divisors, whose sum is σ = 1012213310. Its totient is φ = 1012213308.

The previous prime is 1012213273. The next prime is 1012213357. The reversal of 1012213309 is 9033122101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 825125625 + 187087684 = 28725^2 + 13678^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012213309 - 2¹¹ = 1012211261 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1012213309.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1012213369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506106654 + 506106655.

It is an arithmetic number, because the mean of its divisors is an integer number (506106655).

Almost surely, 2^1012213309 is an apocalyptic number.

It is an amenable number.

1012213309 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012213309 is an equidigital number, since it uses as much as digits as its factorization.

1012213309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 1012213309 is about 31815.2999200070. The cubic root of 1012213309 is about 1004.0546406695.

The spelling of 1012213309 in words is "one billion, twelve million, two hundred thirteen thousand, three hundred nine".