111120012101221 has 2 divisors, whose sum is σ = 111120012101222. Its totient is φ = 111120012101220.

The previous prime is 111120012101159. The next prime is 111120012101311. The reversal of 111120012101221 is 122101210021111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111054481221121 + 65530880100 = 10538239^2 + 255990^2 .

It is a cyclic number.

It is not a de Polignac number, because 111120012101221 - 2¹³ = 111120012093029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111120012101195 and 111120012101204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111120012111221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55560006050610 + 55560006050611.

It is an arithmetic number, because the mean of its divisors is an integer number (55560006050611).

Almost surely, 2^{111120012101221} is an apocalyptic number.

It is an amenable number.

111120012101221 is a deficient number, since it is larger than the sum of its proper divisors (1).

111120012101221 is an equidigital number, since it uses as much as digits as its factorization.

111120012101221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 111120012101221 its reverse (122101210021111), we get a palindrome (233221222122332).

The spelling of 111120012101221 in words is "one hundred eleven trillion, one hundred twenty billion, twelve million, one hundred one thousand, two hundred twenty-one".