111212101313 has 2 divisors, whose sum is σ = 111212101314. Its totient is φ = 111212101312.

The previous prime is 111212101267. The next prime is 111212101327. The reversal of 111212101313 is 313101212111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96228382849 + 14983718464 = 310207^2 + 122408^2 .

It is a cyclic number.

It is not a de Polignac number, because 111212101313 - 2²⁰ = 111211052737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111212101291 and 111212101300.

It is not a weakly prime, because it can be changed into another prime (111212101393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55606050656 + 55606050657.

It is an arithmetic number, because the mean of its divisors is an integer number (55606050657).

Almost surely, 2^111212101313 is an apocalyptic number.

It is an amenable number.

111212101313 is a deficient number, since it is larger than the sum of its proper divisors (1).

111212101313 is an equidigital number, since it uses as much as digits as its factorization.

111212101313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 111212101313 its reverse (313101212111), we get a palindrome (424313313424).

The spelling of 111212101313 in words is "one hundred eleven billion, two hundred twelve million, one hundred one thousand, three hundred thirteen".