1220120212220 has 96 divisors (see below), whose sum is σ = 3163491047808. Its totient is φ = 384929620992.

The previous prime is 1220120212211. The next prime is 1220120212229. The reversal of 1220120212220 is 222120210221.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1220120212211) and next prime (1220120212229).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220120212229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 480467 + ... + 1634346.

It is an arithmetic number, because the mean of its divisors is an integer number (32953031748).

Almost surely, 2^{1220120212220} is an apocalyptic number.

1220120212220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220120212220 is an abundant number, since it is smaller than the sum of its proper divisors (1943370835588).

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

1220120212220 is a wasteful number, since it uses less digits than its factorization.

1220120212220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2115159 (or 2115157 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 1220120212220 its reverse (222120210221), we get a palindrome (1442240422441).

The spelling of 1220120212220 in words is "one trillion, two hundred twenty billion, one hundred twenty million, two hundred twelve thousand, two hundred twenty".