30123232091 has 2 divisors, whose sum is σ = 30123232092. Its totient is φ = 30123232090.

The previous prime is 30123232079. The next prime is 30123232129. The reversal of 30123232091 is 19023232103.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30123232091 is a prime.

It is a super-2 number, since 2×30123232091² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 30123232091.

It is not a weakly prime, because it can be changed into another prime (30123232291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15061616045 + 15061616046.

It is an arithmetic number, because the mean of its divisors is an integer number (15061616046).

Almost surely, 2^30123232091 is an apocalyptic number.

30123232091 is a deficient number, since it is larger than the sum of its proper divisors (1).

30123232091 is an equidigital number, since it uses as much as digits as its factorization.

30123232091 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 26.

Adding to 30123232091 its reverse (19023232103), we get a palindrome (49146464194).

The spelling of 30123232091 in words is "thirty billion, one hundred twenty-three million, two hundred thirty-two thousand, ninety-one".