1321212323212 has 48 divisors (see below), whose sum is σ = 2407787393760. Its totient is φ = 633579028992.

The previous prime is 1321212323203. The next prime is 1321212323237. The reversal of 1321212323212 is 2123232121231.

It is a super-3 number, since 3×1321212323212³ (a number of 37 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78248523 + ... + 78265405.

It is an arithmetic number, because the mean of its divisors is an integer number (50162237370).

Almost surely, 2^{1321212323212} is an apocalyptic number.

It is an amenable number.

1321212323212 is a deficient number, since it is larger than the sum of its proper divisors (1086575070548).

1321212323212 is a wasteful number, since it uses less digits than its factorization.

1321212323212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21370 (or 21368 counting only the distinct ones).

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

Adding to 1321212323212 its reverse (2123232121231), we get a palindrome (3444444444443).

The spelling of 1321212323212 in words is "one trillion, three hundred twenty-one billion, two hundred twelve million, three hundred twenty-three thousand, two hundred twelve".