1212000220 has 48 divisors (see below), whose sum is σ = 2582496000. Its totient is φ = 477734400.

The previous prime is 1212000217. The next prime is 1212000263. The reversal of 1212000220 is 220002121.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 1212000197 and 1212000206.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 620245 + ... + 622195.

It is an arithmetic number, because the mean of its divisors is an integer number (53802000).

Almost surely, 2^1212000220 is an apocalyptic number.

1212000220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212000220 is an abundant number, since it is smaller than the sum of its proper divisors (1370495780).

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

1212000220 is a wasteful number, since it uses less digits than its factorization.

1212000220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2398 (or 2396 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 1212000220 is about 34813.7935307257. The cubic root of 1212000220 is about 1066.1890867687.

Adding to 1212000220 its reverse (220002121), we get a palindrome (1432002341).

The spelling of 1212000220 in words is "one billion, two hundred twelve million, two hundred twenty", and thus it is an aban number.