1220472213220 has 24 divisors (see below), whose sum is σ = 2760144852024. Its totient is φ = 450635894016.

The previous prime is 1220472213211. The next prime is 1220472213223. The reversal of 1220472213220 is 223122740221.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 900960256 + 1219571252964 = 30016^2 + 1104342^2 .

It is not an unprimeable number, because it can be changed into a prime (1220472213223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2347061689 + ... + 2347062208.

It is an arithmetic number, because the mean of its divisors is an integer number (115006035501).

Almost surely, 2^{1220472213220} is an apocalyptic number.

1220472213220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220472213220 is an abundant number, since it is smaller than the sum of its proper divisors (1539672638804).

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

1220472213220 is a wasteful number, since it uses less digits than its factorization.

1220472213220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4694123919 (or 4694123917 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 28.

Adding to 1220472213220 its reverse (223122740221), we get a palindrome (1443594953441).

The spelling of 1220472213220 in words is "one trillion, two hundred twenty billion, four hundred seventy-two million, two hundred thirteen thousand, two hundred twenty".