1221212002112 has 56 divisors (see below), whose sum is σ = 2514213757440. Its totient is φ = 587909306880.

The previous prime is 1221212002103. The next prime is 1221212002133. The reversal of 1221212002112 is 2112002121221.

It is a congruent number.

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, 1171412 + ... + 1953107.

It is an arithmetic number, because the mean of its divisors is an integer number (44896674240).

Almost surely, 2^{1221212002112} is an apocalyptic number.

It is an amenable number.

1221212002112 is an abundant number, since it is smaller than the sum of its proper divisors (1293001755328).

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

1221212002112 is a wasteful number, since it uses less digits than its factorization.

1221212002112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3124759 (or 3124749 counting only the distinct ones).

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

Adding to 1221212002112 its reverse (2112002121221), we get a palindrome (3333214123333).

The spelling of 1221212002112 in words is "one trillion, two hundred twenty-one billion, two hundred twelve million, two thousand, one hundred twelve".