1212212000 has 48 divisors (see below), whose sum is σ = 2978414712. Its totient is φ = 484883200.

The previous prime is 1212211991. The next prime is 1212212059. The reversal of 1212212000 is 2122121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 687068944 + 525143056 = 26212^2 + 22916^2 .

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, 147527 + ... + 155526.

Almost surely, 2^1212212000 is an apocalyptic number.

1212212000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212212000 is an abundant number, since it is smaller than the sum of its proper divisors (1766202712).

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

1212212000 is an equidigital number, since it uses as much as digits as its factorization.

1212212000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303078 (or 303060 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1212212000 is about 34816.8350083692. The cubic root of 1212212000 is about 1066.2511836701.

Adding to 1212212000 its reverse (2122121), we get a palindrome (1214334121).

The spelling of 1212212000 in words is "one billion, two hundred twelve million, two hundred twelve thousand".