2031021023209 has 2 divisors, whose sum is σ = 2031021023210. Its totient is φ = 2031021023208.

The previous prime is 2031021023203. The next prime is 2031021023237. The reversal of 2031021023209 is 9023201201302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1999622246400 + 31398776809 = 1414080^2 + 177197^2 .

It is a cyclic number.

It is not a de Polignac number, because 2031021023209 - 2⁷ = 2031021023081 is a prime.

It is a super-3 number, since 3×2031021023209³ (a number of 38 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (2031021023203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1015510511604 + 1015510511605.

It is an arithmetic number, because the mean of its divisors is an integer number (1015510511605).

Almost surely, 2^{2031021023209} is an apocalyptic number.

It is an amenable number.

2031021023209 is a deficient number, since it is larger than the sum of its proper divisors (1).

2031021023209 is an equidigital number, since it uses as much as digits as its factorization.

2031021023209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

The spelling of 2031021023209 in words is "two trillion, thirty-one billion, twenty-one million, twenty-three thousand, two hundred nine".