111380221 has 2 divisors, whose sum is σ = 111380222. Its totient is φ = 111380220.

The previous prime is 111380219. The next prime is 111380267. The reversal of 111380221 is 122083111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108784900 + 2595321 = 10430^2 + 1611^2 .

It is a cyclic number.

It is not a de Polignac number, because 111380221 - 2¹ = 111380219 is a prime.

Together with 111380219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111380201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55690110 + 55690111.

It is an arithmetic number, because the mean of its divisors is an integer number (55690111).

Almost surely, 2^111380221 is an apocalyptic number.

It is an amenable number.

111380221 is a deficient number, since it is larger than the sum of its proper divisors (1).

111380221 is an equidigital number, since it uses as much as digits as its factorization.

111380221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 19.

The square root of 111380221 is about 10553.6828169128. The cubic root of 111380221 is about 481.1376674680.

The spelling of 111380221 in words is "one hundred eleven million, three hundred eighty thousand, two hundred twenty-one".