1321201311212 has 48 divisors (see below), whose sum is σ = 2397013420032. Its totient is φ = 636784263360.

The previous prime is 1321201311203. The next prime is 1321201311251. The reversal of 1321201311212 is 2121131021231.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13070738 + ... + 13171430.

It is an arithmetic number, because the mean of its divisors is an integer number (49937779584).

Almost surely, 2^{1321201311212} is an apocalyptic number.

It is an amenable number.

1321201311212 is a deficient number, since it is larger than the sum of its proper divisors (1075812108820).

1321201311212 is a wasteful number, since it uses less digits than its factorization.

1321201311212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101798 (or 101796 counting only the distinct ones).

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

Adding to 1321201311212 its reverse (2121131021231), we get a palindrome (3442332332443).

The spelling of 1321201311212 in words is "one trillion, three hundred twenty-one billion, two hundred one million, three hundred eleven thousand, two hundred twelve".