111212302321 has 2 divisors, whose sum is σ = 111212302322. Its totient is φ = 111212302320.

The previous prime is 111212302319. The next prime is 111212302361. The reversal of 111212302321 is 123203212111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81703933921 + 29508368400 = 285839^2 + 171780^2 .

It is a cyclic number.

It is not a de Polignac number, because 111212302321 - 2¹ = 111212302319 is a prime.

Together with 111212302319, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (111212302361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55606151160 + 55606151161.

It is an arithmetic number, because the mean of its divisors is an integer number (55606151161).

Almost surely, 2^111212302321 is an apocalyptic number.

It is an amenable number.

111212302321 is a deficient number, since it is larger than the sum of its proper divisors (1).

111212302321 is an equidigital number, since it uses as much as digits as its factorization.

111212302321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 111212302321 its reverse (123203212111), we get a palindrome (234415514432).

The spelling of 111212302321 in words is "one hundred eleven billion, two hundred twelve million, three hundred two thousand, three hundred twenty-one".