1212303109 has 2 divisors, whose sum is σ = 1212303110. Its totient is φ = 1212303108.

The previous prime is 1212303089. The next prime is 1212303119. The reversal of 1212303109 is 9013032121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1211736100 + 567009 = 34810^2 + 753^2 .

It is an emirp because it is prime and its reverse (9013032121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1212303109 - 2⁵ = 1212303077 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1212303109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212303119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606151554 + 606151555.

It is an arithmetic number, because the mean of its divisors is an integer number (606151555).

Almost surely, 2^1212303109 is an apocalyptic number.

It is an amenable number.

1212303109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212303109 is an equidigital number, since it uses as much as digits as its factorization.

1212303109 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 1212303109 is about 34818.1433881820. The cubic root of 1212303109 is about 1066.2778958969.

The spelling of 1212303109 in words is "one billion, two hundred twelve million, three hundred three thousand, one hundred nine".