111228149 has 2 divisors, whose sum is σ = 111228150. Its totient is φ = 111228148.

The previous prime is 111228133. The next prime is 111228151. The reversal of 111228149 is 941822111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101103025 + 10125124 = 10055^2 + 3182^2 .

It is a cyclic number.

It is not a de Polignac number, because 111228149 - 2⁴ = 111228133 is a prime.

It is a super-2 number, since 2×111228149² = 24743402259932402, which contains 22 as substring.

Together with 111228151, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111228119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55614074 + 55614075.

It is an arithmetic number, because the mean of its divisors is an integer number (55614075).

Almost surely, 2^111228149 is an apocalyptic number.

It is an amenable number.

111228149 is a deficient number, since it is larger than the sum of its proper divisors (1).

111228149 is an equidigital number, since it uses as much as digits as its factorization.

111228149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 29.

The square root of 111228149 is about 10546.4756672549. The cubic root of 111228149 is about 480.9185953815.

The spelling of 111228149 in words is "one hundred eleven million, two hundred twenty-eight thousand, one hundred forty-nine".