31200212213 has 2 divisors, whose sum is σ = 31200212214. Its totient is φ = 31200212212.

The previous prime is 31200212207. The next prime is 31200212243. The reversal of 31200212213 is 31221200213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19277100964 + 11923111249 = 138842^2 + 109193^2 .

It is a cyclic number.

It is not a de Polignac number, because 31200212213 - 2⁸ = 31200211957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31200212191 and 31200212200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31200212243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15600106106 + 15600106107.

It is an arithmetic number, because the mean of its divisors is an integer number (15600106107).

Almost surely, 2^31200212213 is an apocalyptic number.

It is an amenable number.

31200212213 is a deficient number, since it is larger than the sum of its proper divisors (1).

31200212213 is an equidigital number, since it uses as much as digits as its factorization.

31200212213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 31200212213 its reverse (31221200213), we get a palindrome (62421412426).

The spelling of 31200212213 in words is "thirty-one billion, two hundred million, two hundred twelve thousand, two hundred thirteen".