1220320222212 has 48 divisors (see below), whose sum is σ = 3504509359232. Its totient is φ = 321842695680.

The previous prime is 1220320222189. The next prime is 1220320222213. The reversal of 1220320222212 is 2122220230221.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (1220320222213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 558753589 + ... + 558755772.

Almost surely, 2^{1220320222212} is an apocalyptic number.

1220320222212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1220320222212 is an abundant number, since it is smaller than the sum of its proper divisors (2284189137020).

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

1220320222212 is a wasteful number, since it uses less digits than its factorization.

1220320222212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1117509388 (or 1117509386 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 1220320222212 its reverse (2122220230221), we get a palindrome (3342540452433).

The spelling of 1220320222212 in words is "one trillion, two hundred twenty billion, three hundred twenty million, two hundred twenty-two thousand, two hundred twelve".