1212221202112 has 56 divisors (see below), whose sum is σ = 2556912634704. Its totient is φ = 568237228032.

The previous prime is 1212221202083. The next prime is 1212221202151. The reversal of 1212221202112 is 2112021222121.

It is a self number, because there is not a number n which added to its sum of digits gives 1212221202112.

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, 1888038 + ... + 2447269.

Almost surely, 2^{1212221202112} is an apocalyptic number.

It is an amenable number.

1212221202112 is an abundant number, since it is smaller than the sum of its proper divisors (1344691432592).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1212221202112 is a wasteful number, since it uses less digits than its factorization.

1212221202112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4335593 (or 4335583 counting only the distinct ones).

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

Adding to 1212221202112 its reverse (2112021222121), we get a palindrome (3324242424233).

The spelling of 1212221202112 in words is "one trillion, two hundred twelve billion, two hundred twenty-one million, two hundred two thousand, one hundred twelve".