1221222102112 has 24 divisors (see below), whose sum is σ = 2409004584000. Its totient is φ = 609411414144.

The previous prime is 1221222102109. The next prime is 1221222102161. The reversal of 1221222102112 is 2112012221221.

It is a self number, because there is not a number n which added to its sum of digits gives 1221222102112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37472112 + ... + 37504687.

It is an arithmetic number, because the mean of its divisors is an integer number (100375191000).

Almost surely, 2^{1221222102112} is an apocalyptic number.

It is an amenable number.

1221222102112 is a deficient number, since it is larger than the sum of its proper divisors (1187782481888).

1221222102112 is an equidigital number, since it uses as much as digits as its factorization.

1221222102112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74977318 (or 74977310 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 1221222102112 its reverse (2112012221221), we get a palindrome (3333234323333).

The spelling of 1221222102112 in words is "one trillion, two hundred twenty-one billion, two hundred twenty-two million, one hundred two thousand, one hundred twelve".