1228481111 has 16 divisors (see below), whose sum is σ = 1451819040. Its totient is φ = 1030872960.

The previous prime is 1228481101. The next prime is 1228481143. The reversal of 1228481111 is 1111848221.

It is not a de Polignac number, because 1228481111 - 2¹⁸ = 1228218967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228481101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1250 + ... + 49583.

It is an arithmetic number, because the mean of its divisors is an integer number (90738690).

Almost surely, 2^1228481111 is an apocalyptic number.

1228481111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1228481111 is a deficient number, since it is larger than the sum of its proper divisors (223337929).

1228481111 is an equidigital number, since it uses as much as digits as its factorization.

1228481111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50883 (or 50857 counting only the distinct ones).

The product of its digits is 1024, while the sum is 29.

The square root of 1228481111 is about 35049.6948774166. The cubic root of 1228481111 is about 1071.0000581206. Note that the first 4 decimals are identical.

The spelling of 1228481111 in words is "one billion, two hundred twenty-eight million, four hundred eighty-one thousand, one hundred eleven".