31212102209273 has 2 divisors, whose sum is σ = 31212102209274. Its totient is φ = 31212102209272.

The previous prime is 31212102209269. The next prime is 31212102209291. The reversal of 31212102209273 is 37290220121213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30716335541824 + 495766667449 = 5542232^2 + 704107^2 .

It is a cyclic number.

It is not a de Polignac number, because 31212102209273 - 2² = 31212102209269 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (31212102209263) 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, 15606051104636 + 15606051104637.

It is an arithmetic number, because the mean of its divisors is an integer number (15606051104637).

Almost surely, 2^{31212102209273} is an apocalyptic number.

It is an amenable number.

31212102209273 is a deficient number, since it is larger than the sum of its proper divisors (1).

31212102209273 is an equidigital number, since it uses as much as digits as its factorization.

31212102209273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 35.

The spelling of 31212102209273 in words is "thirty-one trillion, two hundred twelve billion, one hundred two million, two hundred nine thousand, two hundred seventy-three".