30312031129 has 2 divisors, whose sum is σ = 30312031130. Its totient is φ = 30312031128.

The previous prime is 30312031117. The next prime is 30312031133. The reversal of 30312031129 is 92113021303.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24187403529 + 6124627600 = 155523^2 + 78260^2 .

It is an emirp because it is prime and its reverse (92113021303) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30312031129 is a prime.

It is not a weakly prime, because it can be changed into another prime (30312035129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15156015564 + 15156015565.

It is an arithmetic number, because the mean of its divisors is an integer number (15156015565).

Almost surely, 2^30312031129 is an apocalyptic number.

It is an amenable number.

30312031129 is a deficient number, since it is larger than the sum of its proper divisors (1).

30312031129 is an equidigital number, since it uses as much as digits as its factorization.

30312031129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 25.

The spelling of 30312031129 in words is "thirty billion, three hundred twelve million, thirty-one thousand, one hundred twenty-nine".