31211002032313 has 2 divisors, whose sum is σ = 31211002032314. Its totient is φ = 31211002032312.

The previous prime is 31211002032227. The next prime is 31211002032317. The reversal of 31211002032313 is 31323020011213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31187343900969 + 23658131344 = 5584563^2 + 153812^2 .

It is a cyclic number.

It is not a de Polignac number, because 31211002032313 - 2⁹ = 31211002031801 is a prime.

It is a super-2 number, since 2×31211002032313² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31211002032317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15605501016156 + 15605501016157.

It is an arithmetic number, because the mean of its divisors is an integer number (15605501016157).

Almost surely, 2^{31211002032313} is an apocalyptic number.

It is an amenable number.

31211002032313 is a deficient number, since it is larger than the sum of its proper divisors (1).

31211002032313 is an equidigital number, since it uses as much as digits as its factorization.

31211002032313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 31211002032313 its reverse (31323020011213), we get a palindrome (62534022043526).

The spelling of 31211002032313 in words is "thirty-one trillion, two hundred eleven billion, two million, thirty-two thousand, three hundred thirteen".