1221201202112 has 14 divisors (see below), whose sum is σ = 2423321135568. Its totient is φ = 610600601024.

The previous prime is 1221201202103. The next prime is 1221201202121. The reversal of 1221201202112 is 2112021021221.

It is an interprime number because it is at equal distance from previous prime (1221201202103) and next prime (1221201202121).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9540634328 + ... + 9540634455.

Almost surely, 2^{1221201202112} is an apocalyptic number.

It is an amenable number.

1221201202112 is a deficient number, since it is larger than the sum of its proper divisors (1202119933456).

1221201202112 is an equidigital number, since it uses as much as digits as its factorization.

1221201202112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19081268795 (or 19081268785 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1221201202112 its reverse (2112021021221), we get a palindrome (3333222223333).

The spelling of 1221201202112 in words is "one trillion, two hundred twenty-one billion, two hundred one million, two hundred two thousand, one hundred twelve".