1212120312 has 32 divisors (see below), whose sum is σ = 3263401680. Its totient is φ = 372960000.

The previous prime is 1212120253. The next prime is 1212120341. The reversal of 1212120312 is 2130212121.

It is a junction number, because it is equal to n+sod(n) for n = 1212120291 and 1212120300.

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, 1942189 + ... + 1942812.

Almost surely, 2^1212120312 is an apocalyptic number.

1212120312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1212120312 is an abundant number, since it is smaller than the sum of its proper divisors (2051281368).

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

1212120312 is a wasteful number, since it uses less digits than its factorization.

1212120312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3885023 (or 3885019 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1212120312 is about 34815.5182641304. The cubic root of 1212120312 is about 1066.2243003352.

Adding to 1212120312 its reverse (2130212121), we get a palindrome (3342332433).

The spelling of 1212120312 in words is "one billion, two hundred twelve million, one hundred twenty thousand, three hundred twelve".