111155722213 has 2 divisors, whose sum is σ = 111155722214. Its totient is φ = 111155722212.

The previous prime is 111155722199. The next prime is 111155722253. The reversal of 111155722213 is 312227551111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66836209729 + 44319512484 = 258527^2 + 210522^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111155722213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111155722253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55577861106 + 55577861107.

It is an arithmetic number, because the mean of its divisors is an integer number (55577861107).

Almost surely, 2^111155722213 is an apocalyptic number.

It is an amenable number.

111155722213 is a deficient number, since it is larger than the sum of its proper divisors (1).

111155722213 is an equidigital number, since it uses as much as digits as its factorization.

111155722213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4200, while the sum is 31.

The spelling of 111155722213 in words is "one hundred eleven billion, one hundred fifty-five million, seven hundred twenty-two thousand, two hundred thirteen".