1220303321012 has 6 divisors (see below), whose sum is σ = 2135530811778. Its totient is φ = 610151660504.

The previous prime is 1220303320961. The next prime is 1220303321051. The reversal of 1220303321012 is 2101233030221.

It can be written as a sum of positive squares in only one way, i.e., 1041616195216 + 178687125796 = 1020596^2 + 422714^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152537915123 + ... + 152537915130.

It is an arithmetic number, because the mean of its divisors is an integer number (355921801963).

Almost surely, 2^{1220303321012} is an apocalyptic number.

It is an amenable number.

1220303321012 is a deficient number, since it is larger than the sum of its proper divisors (915227490766).

1220303321012 is a wasteful number, since it uses less digits than its factorization.

1220303321012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305075830257 (or 305075830255 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 1220303321012 its reverse (2101233030221), we get a palindrome (3321536351233).

The spelling of 1220303321012 in words is "one trillion, two hundred twenty billion, three hundred three million, three hundred twenty-one thousand, twelve".