111506022106321 has 2 divisors, whose sum is σ = 111506022106322. Its totient is φ = 111506022106320.

The previous prime is 111506022106319. The next prime is 111506022106331. The reversal of 111506022106321 is 123601220605111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78912930057025 + 32593092049296 = 8883295^2 + 5709036^2 .

It is a cyclic number.

It is not a de Polignac number, because 111506022106321 - 2¹ = 111506022106319 is a prime.

Together with 111506022106319, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (111506022106301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55753011053160 + 55753011053161.

It is an arithmetic number, because the mean of its divisors is an integer number (55753011053161).

Almost surely, 2^{111506022106321} is an apocalyptic number.

It is an amenable number.

111506022106321 is a deficient number, since it is larger than the sum of its proper divisors (1).

111506022106321 is an equidigital number, since it uses as much as digits as its factorization.

111506022106321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 31.

The spelling of 111506022106321 in words is "one hundred eleven trillion, five hundred six billion, twenty-two million, one hundred six thousand, three hundred twenty-one".