31112221212133 has 2 divisors, whose sum is σ = 31112221212134. Its totient is φ = 31112221212132.

The previous prime is 31112221212113. The next prime is 31112221212161. The reversal of 31112221212133 is 33121212221113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26422406514529 + 4689814697604 = 5140273^2 + 2165598^2 .

It is a cyclic number.

It is not a de Polignac number, because 31112221212133 - 2¹⁷ = 31112221081061 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31112221212098 and 31112221212107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31112221212113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15556110606066 + 15556110606067.

It is an arithmetic number, because the mean of its divisors is an integer number (15556110606067).

Almost surely, 2^{31112221212133} is an apocalyptic number.

It is an amenable number.

31112221212133 is a deficient number, since it is larger than the sum of its proper divisors (1).

31112221212133 is an equidigital number, since it uses as much as digits as its factorization.

31112221212133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 25.

Adding to 31112221212133 its reverse (33121212221113), we get a palindrome (64233433433246).

The spelling of 31112221212133 in words is "thirty-one trillion, one hundred twelve billion, two hundred twenty-one million, two hundred twelve thousand, one hundred thirty-three".