1220002112220 has 96 divisors (see below), whose sum is σ = 3509410513728. Its totient is φ = 316443635712.

The previous prime is 1220002112201. The next prime is 1220002112249. The reversal of 1220002112220 is 222112000221.

It is a super-2 number, since 2×1220002112220² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1220002112220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7271922 + ... + 7437798.

It is an arithmetic number, because the mean of its divisors is an integer number (36556359518).

Almost surely, 2^{1220002112220} is an apocalyptic number.

1220002112220 is a gapful number since it is divisible by the number (10) 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 1220002112220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1754705256864).

1220002112220 is an abundant number, since it is smaller than the sum of its proper divisors (2289408401508).

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

1220002112220 is a wasteful number, since it uses less digits than its factorization.

1220002112220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169239 (or 169237 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 1220002112220 its reverse (222112000221), we get a palindrome (1442114112441).

The spelling of 1220002112220 in words is "one trillion, two hundred twenty billion, two million, one hundred twelve thousand, two hundred twenty".