1228606111 has 4 divisors (see below), whose sum is σ = 1282023792. Its totient is φ = 1175188432.

The previous prime is 1228606109. The next prime is 1228606129. The reversal of 1228606111 is 1116068221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1116068221 = 821 ⋅1359401.

It is a cyclic number.

It is not a de Polignac number, because 1228606111 - 2¹ = 1228606109 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1228606111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228606811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26708806 + ... + 26708851.

It is an arithmetic number, because the mean of its divisors is an integer number (320505948).

Almost surely, 2^1228606111 is an apocalyptic number.

1228606111 is a deficient number, since it is larger than the sum of its proper divisors (53417681).

1228606111 is an equidigital number, since it uses as much as digits as its factorization.

1228606111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53417680.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 1228606111 is about 35051.4780144861. The cubic root of 1228606111 is about 1071.0363822354.

The spelling of 1228606111 in words is "one billion, two hundred twenty-eight million, six hundred six thousand, one hundred eleven".