31300021133 has 2 divisors, whose sum is σ = 31300021134. Its totient is φ = 31300021132.

The previous prime is 31300021073. The next prime is 31300021153. The reversal of 31300021133 is 33112000313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29356710244 + 1943310889 = 171338^2 + 44083^2 .

It is a cyclic number.

It is not a de Polignac number, because 31300021133 - 2¹⁰ = 31300020109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31300021153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15650010566 + 15650010567.

It is an arithmetic number, because the mean of its divisors is an integer number (15650010567).

Almost surely, 2^31300021133 is an apocalyptic number.

It is an amenable number.

31300021133 is a deficient number, since it is larger than the sum of its proper divisors (1).

31300021133 is an equidigital number, since it uses as much as digits as its factorization.

31300021133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 17.

Adding to 31300021133 its reverse (33112000313), we get a palindrome (64412021446).

The spelling of 31300021133 in words is "thirty-one billion, three hundred million, twenty-one thousand, one hundred thirty-three".