30312117091 has 2 divisors, whose sum is σ = 30312117092. Its totient is φ = 30312117090.

The previous prime is 30312117079. The next prime is 30312117107. The reversal of 30312117091 is 19071121303.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 30312117091 - 2¹⁹ = 30311592803 is a prime.

It is not a weakly prime, because it can be changed into another prime (30312117041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15156058545 + 15156058546.

It is an arithmetic number, because the mean of its divisors is an integer number (15156058546).

Almost surely, 2^30312117091 is an apocalyptic number.

30312117091 is a deficient number, since it is larger than the sum of its proper divisors (1).

30312117091 is an equidigital number, since it uses as much as digits as its factorization.

30312117091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1134, while the sum is 28.

Adding to 30312117091 its reverse (19071121303), we get a palindrome (49383238394).

The spelling of 30312117091 in words is "thirty billion, three hundred twelve million, one hundred seventeen thousand, ninety-one".