1231212012 has 24 divisors (see below), whose sum is σ = 3041818416. Its totient is φ = 386262528.

The previous prime is 1231211987. The next prime is 1231212049. The reversal of 1231212012 is 2102121321.

1231212012 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 1231211982 and 1231212000.

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, 3017473 + ... + 3017880.

It is an arithmetic number, because the mean of its divisors is an integer number (126742434).

Almost surely, 2^1231212012 is an apocalyptic number.

1231212012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1231212012 is an abundant number, since it is smaller than the sum of its proper divisors (1810606404).

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

1231212012 is a wasteful number, since it uses less digits than its factorization.

1231212012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6035377 (or 6035375 counting only the distinct ones).

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

The square root of 1231212012 is about 35088.6308082832. The cubic root of 1231212012 is about 1071.7930781930.

Adding to 1231212012 its reverse (2102121321), we get a palindrome (3333333333).

The spelling of 1231212012 in words is "one billion, two hundred thirty-one million, two hundred twelve thousand, twelve".