31212101311 has 2 divisors, whose sum is σ = 31212101312. Its totient is φ = 31212101310.

The previous prime is 31212101257. The next prime is 31212101317. The reversal of 31212101311 is 11310121213.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (11310121213) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31212101311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31212101317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15606050655 + 15606050656.

It is an arithmetic number, because the mean of its divisors is an integer number (15606050656).

Almost surely, 2^31212101311 is an apocalyptic number.

31212101311 is a deficient number, since it is larger than the sum of its proper divisors (1).

31212101311 is an equidigital number, since it uses as much as digits as its factorization.

31212101311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 31212101311 its reverse (11310121213), we get a palindrome (42522222524).

The spelling of 31212101311 in words is "thirty-one billion, two hundred twelve million, one hundred one thousand, three hundred eleven".