111344381 has 2 divisors, whose sum is σ = 111344382. Its totient is φ = 111344380.

The previous prime is 111344377. The next prime is 111344383. The reversal of 111344381 is 183443111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87422500 + 23921881 = 9350^2 + 4891^2 .

It is a cyclic number.

It is not a de Polignac number, because 111344381 - 2² = 111344377 is a prime.

It is a super-2 number, since 2×111344381² = 24795142360546322, which contains 22 as substring.

Together with 111344383, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111344381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111344383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55672190 + 55672191.

It is an arithmetic number, because the mean of its divisors is an integer number (55672191).

Almost surely, 2^111344381 is an apocalyptic number.

It is an amenable number.

111344381 is a deficient number, since it is larger than the sum of its proper divisors (1).

111344381 is an equidigital number, since it uses as much as digits as its factorization.

111344381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 26.

The square root of 111344381 is about 10551.9846948335. The cubic root of 111344381 is about 481.0860550010.

Adding to 111344381 its reverse (183443111), we get a palindrome (294787492).

The spelling of 111344381 in words is "one hundred eleven million, three hundred forty-four thousand, three hundred eighty-one".