216122511313 has 2 divisors, whose sum is σ = 216122511314. Its totient is φ = 216122511312.

The previous prime is 216122511299. The next prime is 216122511373. The reversal of 216122511313 is 313115221612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 176289137424 + 39833373889 = 419868^2 + 199583^2 .

It is a cyclic number.

It is not a de Polignac number, because 216122511313 - 2²⁹ = 215585640401 is a prime.

It is not a weakly prime, because it can be changed into another prime (216122511373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108061255656 + 108061255657.

It is an arithmetic number, because the mean of its divisors is an integer number (108061255657).

Almost surely, 2^216122511313 is an apocalyptic number.

It is an amenable number.

216122511313 is a deficient number, since it is larger than the sum of its proper divisors (1).

216122511313 is an equidigital number, since it uses as much as digits as its factorization.

216122511313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 28.

Adding to 216122511313 its reverse (313115221612), we get a palindrome (529237732925).

The spelling of 216122511313 in words is "two hundred sixteen billion, one hundred twenty-two million, five hundred eleven thousand, three hundred thirteen".