30203212309 has 2 divisors, whose sum is σ = 30203212310. Its totient is φ = 30203212308.

The previous prime is 30203212267. The next prime is 30203212321. The reversal of 30203212309 is 90321230203.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29580560100 + 622652209 = 171990^2 + 24953^2 .

It is a cyclic number.

It is not a de Polignac number, because 30203212309 - 2²¹ = 30201115157 is a prime.

It is a super-2 number, since 2×30203212309² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30203282309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15101606154 + 15101606155.

It is an arithmetic number, because the mean of its divisors is an integer number (15101606155).

Almost surely, 2^30203212309 is an apocalyptic number.

It is an amenable number.

30203212309 is a deficient number, since it is larger than the sum of its proper divisors (1).

30203212309 is an equidigital number, since it uses as much as digits as its factorization.

30203212309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 25.

The spelling of 30203212309 in words is "thirty billion, two hundred three million, two hundred twelve thousand, three hundred nine".