1221201201112 has 16 divisors (see below), whose sum is σ = 2289960708840. Its totient is φ = 610545012096.

The previous prime is 1221201201097. The next prime is 1221201201161. The reversal of 1221201201112 is 2111021021221.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 6855118 + ... + 7031005.

Almost surely, 2^{1221201201112} is an apocalyptic number.

It is an amenable number.

1221201201112 is a deficient number, since it is larger than the sum of its proper divisors (1068759507728).

1221201201112 is a wasteful number, since it uses less digits than its factorization.

1221201201112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13897122 (or 13897118 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1221201201112 its reverse (2111021021221), we get a palindrome (3332222222333).

The spelling of 1221201201112 in words is "one trillion, two hundred twenty-one billion, two hundred one million, two hundred one thousand, one hundred twelve".