1321213011212 has 24 divisors (see below), whose sum is σ = 2389857403920. Its totient is φ = 638763716160.

The previous prime is 1321213011199. The next prime is 1321213011227. The reversal of 1321213011212 is 2121103121231.

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, 45873803 + ... + 45902594.

It is an arithmetic number, because the mean of its divisors is an integer number (99577391830).

Almost surely, 2^{1321213011212} is an apocalyptic number.

It is an amenable number.

1321213011212 is a deficient number, since it is larger than the sum of its proper divisors (1068644392708).

1321213011212 is a wasteful number, since it uses less digits than its factorization.

1321213011212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91776521 (or 91776519 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 1321213011212 its reverse (2121103121231), we get a palindrome (3442316132443).

The spelling of 1321213011212 in words is "one trillion, three hundred twenty-one billion, two hundred thirteen million, eleven thousand, two hundred twelve".