1212332221312 has 32 divisors (see below), whose sum is σ = 2415318685920. Its totient is φ = 606134590464.

The previous prime is 1212332221301. The next prime is 1212332221333. The reversal of 1212332221312 is 2131222332121.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2329788 + ... + 2802244.

It is an arithmetic number, because the mean of its divisors is an integer number (75478708935).

Almost surely, 2^{1212332221312} is an apocalyptic number.

It is an amenable number.

1212332221312 is a deficient number, since it is larger than the sum of its proper divisors (1202986464608).

1212332221312 is an equidigital number, since it uses as much as digits as its factorization.

1212332221312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492518 (or 492506 counting only the distinct ones).

The product of its digits is 1728, while the sum is 25.

Adding to 1212332221312 its reverse (2131222332121), we get a palindrome (3343554553433).

The spelling of 1212332221312 in words is "one trillion, two hundred twelve billion, three hundred thirty-two million, two hundred twenty-one thousand, three hundred twelve".