31330221001133 has 2 divisors, whose sum is σ = 31330221001134. Its totient is φ = 31330221001132.

The previous prime is 31330221001103. The next prime is 31330221001181. The reversal of 31330221001133 is 33110012203313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23537653839844 + 7792567161289 = 4851562^2 + 2791517^2 .

It is a cyclic number.

It is not a de Polignac number, because 31330221001133 - 2⁴⁰ = 30230709373357 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31330221001099 and 31330221001108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31330221001103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15665110500566 + 15665110500567.

It is an arithmetic number, because the mean of its divisors is an integer number (15665110500567).

Almost surely, 2^{31330221001133} is an apocalyptic number.

It is an amenable number.

31330221001133 is a deficient number, since it is larger than the sum of its proper divisors (1).

31330221001133 is an equidigital number, since it uses as much as digits as its factorization.

31330221001133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 31330221001133 its reverse (33110012203313), we get a palindrome (64440233204446).

The spelling of 31330221001133 in words is "thirty-one trillion, three hundred thirty billion, two hundred twenty-one million, one thousand, one hundred thirty-three".