1229189112 has 48 divisors (see below), whose sum is σ = 3331386240. Its totient is φ = 409442688.

The previous prime is 1229189077. The next prime is 1229189123. The reversal of 1229189112 is 2119819221.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 114153 + ... + 124455.

It is an arithmetic number, because the mean of its divisors is an integer number (69403880).

Almost surely, 2^1229189112 is an apocalyptic number.

1229189112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1229189112 is an abundant number, since it is smaller than the sum of its proper divisors (2102197128).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1229189112 is a wasteful number, since it uses less digits than its factorization.

1229189112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11972 (or 11965 counting only the distinct ones).

The product of its digits is 5184, while the sum is 36.

The square root of 1229189112 is about 35059.7933821636. The cubic root of 1229189112 is about 1071.2057656627.

The spelling of 1229189112 in words is "one billion, two hundred twenty-nine million, one hundred eighty-nine thousand, one hundred twelve".