31020331320109 has 2 divisors, whose sum is σ = 31020331320110. Its totient is φ = 31020331320108.

The previous prime is 31020331320103. The next prime is 31020331320133. The reversal of 31020331320109 is 90102313302013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16728075460009 + 14292255860100 = 4089997^2 + 3780510^2 .

It is a cyclic number.

It is not a de Polignac number, because 31020331320109 - 2⁷ = 31020331319981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31020331320103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15510165660054 + 15510165660055.

It is an arithmetic number, because the mean of its divisors is an integer number (15510165660055).

Almost surely, 2^{31020331320109} is an apocalyptic number.

It is an amenable number.

31020331320109 is a deficient number, since it is larger than the sum of its proper divisors (1).

31020331320109 is an equidigital number, since it uses as much as digits as its factorization.

31020331320109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 28.

The spelling of 31020331320109 in words is "thirty-one trillion, twenty billion, three hundred thirty-one million, three hundred twenty thousand, one hundred nine".