1220101222212 has 120 divisors (see below), whose sum is σ = 3206601167616. Its totient is φ = 406206521568.

The previous prime is 1220101222187. The next prime is 1220101222217. The reversal of 1220101222212 is 2122221010221.

It is a happy number.

1220101222212 is a `hidden beast` number, since 1 + 220 + 10 + 1 + 222 + 212 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1220101222217) by changing a digit.

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 39 ways as a sum of consecutive naturals, for example, 67936738 + ... + 67954694.

Almost surely, 2^{1220101222212} is an apocalyptic number.

1220101222212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1220101222212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1603300583808).

1220101222212 is an abundant number, since it is smaller than the sum of its proper divisors (1986499945404).

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

1220101222212 is an frugal number, since it uses more digits than its factorization.

1220101222212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18851 (or 18825 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1220101222212 its reverse (2122221010221), we get a palindrome (3342322232433).

The spelling of 1220101222212 in words is "one trillion, two hundred twenty billion, one hundred one million, two hundred twenty-two thousand, two hundred twelve".