1212020012 has 12 divisors (see below), whose sum is σ = 2424040080. Its totient is φ = 519437136.

The previous prime is 1212020011. The next prime is 1212020027. The reversal of 1212020012 is 2100202121.

It is a happy number.

1212020012 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 1212019975 and 1212020002.

It is not an unprimeable number, because it can be changed into a prime (1212020011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21643187 + ... + 21643242.

It is an arithmetic number, because the mean of its divisors is an integer number (202003340).

Almost surely, 2^1212020012 is an apocalyptic number.

It is an amenable number.

1212020012 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1212020012 is a wasteful number, since it uses less digits than its factorization.

1212020012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43286440 (or 43286438 counting only the distinct ones).

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

The square root of 1212020012 is about 34814.0777847123. The cubic root of 1212020012 is about 1066.1948903704.

Adding to 1212020012 its reverse (2100202121), we get a palindrome (3312222133).

The spelling of 1212020012 in words is "one billion, two hundred twelve million, twenty thousand, twelve".