30131302021 has 2 divisors, whose sum is σ = 30131302022. Its totient is φ = 30131302020.

The previous prime is 30131302001. The next prime is 30131302067. The reversal of 30131302021 is 12020313103.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16585833796 + 13545468225 = 128786^2 + 116385^2 .

It is a cyclic number.

It is not a de Polignac number, because 30131302021 - 2⁵ = 30131301989 is a prime.

It is a super-2 number, since 2×30131302021² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 30131301986 and 30131302004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30131302001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15065651010 + 15065651011.

It is an arithmetic number, because the mean of its divisors is an integer number (15065651011).

Almost surely, 2^30131302021 is an apocalyptic number.

It is an amenable number.

30131302021 is a deficient number, since it is larger than the sum of its proper divisors (1).

30131302021 is an equidigital number, since it uses as much as digits as its factorization.

30131302021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 30131302021 its reverse (12020313103), we get a palindrome (42151615124).

The spelling of 30131302021 in words is "thirty billion, one hundred thirty-one million, three hundred two thousand, twenty-one".