1031112201209 has 2 divisors, whose sum is σ = 1031112201210. Its totient is φ = 1031112201208.

The previous prime is 1031112201191. The next prime is 1031112201211. The reversal of 1031112201209 is 9021022111301.

1031112201209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 878409445225 + 152702755984 = 937235^2 + 390772^2 .

It is a cyclic number.

It is not a de Polignac number, because 1031112201209 - 2¹⁶ = 1031112135673 is a prime.

Together with 1031112201211, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1031112201269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 515556100604 + 515556100605.

It is an arithmetic number, because the mean of its divisors is an integer number (515556100605).

Almost surely, 2^{1031112201209} is an apocalyptic number.

It is an amenable number.

1031112201209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1031112201209 is an equidigital number, since it uses as much as digits as its factorization.

1031112201209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 23.

It can be divided in two parts, 1031112 and 201209, that added together give a palindrome (1232321).

The spelling of 1031112201209 in words is "one trillion, thirty-one billion, one hundred twelve million, two hundred one thousand, two hundred nine".