1220221210012 has 96 divisors (see below), whose sum is σ = 2726146644480. Its totient is φ = 465231237120.

The previous prime is 1220221210003. The next prime is 1220221210081. The reversal of 1220221210012 is 2100121220221.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3854212 + ... + 4158772.

It is an arithmetic number, because the mean of its divisors is an integer number (28397360880).

Almost surely, 2^{1220221210012} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1220221210012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1363073322240).

1220221210012 is an abundant number, since it is smaller than the sum of its proper divisors (1505925434468).

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

1220221210012 is a wasteful number, since it uses less digits than its factorization.

1220221210012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305051 (or 305049 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1220221210012 its reverse (2100121220221), we get a palindrome (3320342430233).

The spelling of 1220221210012 in words is "one trillion, two hundred twenty billion, two hundred twenty-one million, two hundred ten thousand, twelve".