1321201222112 has 48 divisors (see below), whose sum is σ = 2603449899792. Its totient is φ = 660007941120.

The previous prime is 1321201222097. The next prime is 1321201222129. The reversal of 1321201222112 is 2112221021231.

It is a congruent number.

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, 263657687 + ... + 263662697.

It is an arithmetic number, because the mean of its divisors is an integer number (54238539579).

Almost surely, 2^{1321201222112} is an apocalyptic number.

It is an amenable number.

1321201222112 is a deficient number, since it is larger than the sum of its proper divisors (1282248677680).

1321201222112 is a wasteful number, since it uses less digits than its factorization.

1321201222112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10771 (or 10763 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 1321201222112 its reverse (2112221021231), we get a palindrome (3433422243343).

The spelling of 1321201222112 in words is "one trillion, three hundred twenty-one billion, two hundred one million, two hundred twenty-two thousand, one hundred twelve".