1189213212 has 24 divisors (see below), whose sum is σ = 3027088512. Its totient is φ = 360367600.

The previous prime is 1189213187. The next prime is 1189213303. The reversal of 1189213212 is 2123129811.

It is a self number, because there is not a number n which added to its sum of digits gives 1189213212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4504464 + ... + 4504727.

It is an arithmetic number, because the mean of its divisors is an integer number (126128688).

Almost surely, 2^1189213212 is an apocalyptic number.

1189213212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1189213212 is an abundant number, since it is smaller than the sum of its proper divisors (1837875300).

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

1189213212 is a wasteful number, since it uses less digits than its factorization.

1189213212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9009209 (or 9009207 counting only the distinct ones).

The product of its digits is 1728, while the sum is 30.

The square root of 1189213212 is about 34484.9708133848. The cubic root of 1189213212 is about 1059.4649049586.

The spelling of 1189213212 in words is "one billion, one hundred eighty-nine million, two hundred thirteen thousand, two hundred twelve".