1220321321032 has 16 divisors (see below), whose sum is σ = 2496111793200. Its totient is φ = 554691509520.

The previous prime is 1220321320957. The next prime is 1220321321053. The reversal of 1220321321032 is 2301231230221.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 1220321320994 and 1220321321012.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 6933643782 + ... + 6933643957.

It is an arithmetic number, because the mean of its divisors is an integer number (156006987075).

Almost surely, 2^{1220321321032} is an apocalyptic number.

It is an amenable number.

1220321321032 is an abundant number, since it is smaller than the sum of its proper divisors (1275790472168).

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

1220321321032 is a wasteful number, since it uses less digits than its factorization.

1220321321032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13867287756 (or 13867287752 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 1220321321032 its reverse (2301231230221), we get a palindrome (3521552551253).

The spelling of 1220321321032 in words is "one trillion, two hundred twenty billion, three hundred twenty-one million, three hundred twenty-one thousand, thirty-two".