111012022112221 has 2 divisors, whose sum is σ = 111012022112222. Its totient is φ = 111012022112220.

The previous prime is 111012022112183. The next prime is 111012022112237. The reversal of 111012022112221 is 122211220210111.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99354843936100 + 11657178176121 = 9967690^2 + 3414261^2 .

It is a cyclic number.

It is not a de Polignac number, because 111012022112221 - 2⁷ = 111012022112093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111012022112021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55506011056110 + 55506011056111.

It is an arithmetic number, because the mean of its divisors is an integer number (55506011056111).

Almost surely, 2^{111012022112221} is an apocalyptic number.

It is an amenable number.

111012022112221 is a deficient number, since it is larger than the sum of its proper divisors (1).

111012022112221 is an equidigital number, since it uses as much as digits as its factorization.

111012022112221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 111012022112221 its reverse (122211220210111), we get a palindrome (233223242322332).

The spelling of 111012022112221 in words is "one hundred eleven trillion, twelve billion, twenty-two million, one hundred twelve thousand, two hundred twenty-one".