1220321301312 has 28 divisors (see below), whose sum is σ = 3228766776896. Its totient is φ = 406773767040.

The previous prime is 1220321301307. The next prime is 1220321301349. The reversal of 1220321301312 is 2131031230221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3177919864 + ... + 3177920247.

Almost surely, 2^{1220321301312} is an apocalyptic number.

1220321301312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1220321301312 is an abundant number, since it is smaller than the sum of its proper divisors (2008445475584).

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

1220321301312 is an equidigital number, since it uses as much as digits as its factorization.

1220321301312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6355840126 (or 6355840116 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1220321301312 its reverse (2131031230221), we get a palindrome (3351352531533).

The spelling of 1220321301312 in words is "one trillion, two hundred twenty billion, three hundred twenty-one million, three hundred one thousand, three hundred twelve".