1221232012012 has 12 divisors (see below), whose sum is σ = 2166432131416. Its totient is φ = 602251403040.

The previous prime is 1221232011997. The next prime is 1221232012019. The reversal of 1221232012012 is 2102102321221.

It is not an unprimeable number, because it can be changed into a prime (1221232012019) 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, 2091150414 + ... + 2091150997.

Almost surely, 2^{1221232012012} is an apocalyptic number.

It is an amenable number.

1221232012012 is a deficient number, since it is larger than the sum of its proper divisors (945200119404).

1221232012012 is a wasteful number, since it uses less digits than its factorization.

1221232012012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4182301488 (or 4182301486 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 1221232012012 its reverse (2102102321221), we get a palindrome (3323334333233).

The spelling of 1221232012012 in words is "one trillion, two hundred twenty-one billion, two hundred thirty-two million, twelve thousand, twelve".