31300313243021 has 2 divisors, whose sum is σ = 31300313243022. Its totient is φ = 31300313243020.

The previous prime is 31300313242967. The next prime is 31300313243107. The reversal of 31300313243021 is 12034231300313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26022863790121 + 5277449452900 = 5101261^2 + 2297270^2 .

It is a cyclic number.

It is not a de Polignac number, because 31300313243021 - 2¹⁰ = 31300313241997 is a prime.

It is a super-2 number, since 2×31300313243021² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31300313203021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15650156621510 + 15650156621511.

It is an arithmetic number, because the mean of its divisors is an integer number (15650156621511).

Almost surely, 2^{31300313243021} is an apocalyptic number.

It is an amenable number.

31300313243021 is a deficient number, since it is larger than the sum of its proper divisors (1).

31300313243021 is an equidigital number, since it uses as much as digits as its factorization.

31300313243021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 31300313243021 its reverse (12034231300313), we get a palindrome (43334544543334).

The spelling of 31300313243021 in words is "thirty-one trillion, three hundred billion, three hundred thirteen million, two hundred forty-three thousand, twenty-one".