31113300002021 has 2 divisors, whose sum is σ = 31113300002022. Its totient is φ = 31113300002020.

The previous prime is 31113300002017. The next prime is 31113300002111. The reversal of 31113300002021 is 12020000331113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30230478150625 + 882821851396 = 5498225^2 + 939586^2 .

It is a cyclic number.

It is not a de Polignac number, because 31113300002021 - 2² = 31113300002017 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31113300004021) 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, 15556650001010 + 15556650001011.

It is an arithmetic number, because the mean of its divisors is an integer number (15556650001011).

Almost surely, 2^{31113300002021} is an apocalyptic number.

It is an amenable number.

31113300002021 is a deficient number, since it is larger than the sum of its proper divisors (1).

31113300002021 is an equidigital number, since it uses as much as digits as its factorization.

31113300002021 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 17.

Adding to 31113300002021 its reverse (12020000331113), we get a palindrome (43133300333134).

The spelling of 31113300002021 in words is "thirty-one trillion, one hundred thirteen billion, three hundred million, two thousand, twenty-one".