1221010120112 has 10 divisors (see below), whose sum is σ = 2365707107748. Its totient is φ = 610505060048.

The previous prime is 1221010120069. The next prime is 1221010120159. The reversal of 1221010120112 is 2110210101221.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38156566238 + ... + 38156566269.

Almost surely, 2^{1221010120112} is an apocalyptic number.

It is an amenable number.

1221010120112 is a deficient number, since it is larger than the sum of its proper divisors (1144696987636).

1221010120112 is an equidigital number, since it uses as much as digits as its factorization.

1221010120112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76313132515 (or 76313132509 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1221010120112 its reverse (2110210101221), we get a palindrome (3331220221333).

The spelling of 1221010120112 in words is "one trillion, two hundred twenty-one billion, ten million, one hundred twenty thousand, one hundred twelve".