1212312012 has 12 divisors (see below), whose sum is σ = 2828728056. Its totient is φ = 404104000.

The previous prime is 1212311981. The next prime is 1212312019. The reversal of 1212312012 is 2102132121.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 1212311982 and 1212312000.

It is not an unprimeable number, because it can be changed into a prime (1212312019) 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, 50512989 + ... + 50513012.

It is an arithmetic number, because the mean of its divisors is an integer number (235727338).

Almost surely, 2^1212312012 is an apocalyptic number.

1212312012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1212312012 is an abundant number, since it is smaller than the sum of its proper divisors (1616416044).

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

1212312012 is a wasteful number, since it uses less digits than its factorization.

1212312012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101026008 (or 101026006 counting only the distinct ones).

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

The square root of 1212312012 is about 34818.2712379578. The cubic root of 1212312012 is about 1066.2805060936.

Adding to 1212312012 its reverse (2102132121), we get a palindrome (3314444133).

The spelling of 1212312012 in words is "one billion, two hundred twelve million, three hundred twelve thousand, twelve".