1220202220322 has 4 divisors (see below), whose sum is σ = 1830303330486. Its totient is φ = 610101110160.

The previous prime is 1220202220271. The next prime is 1220202220331. The reversal of 1220202220322 is 2230222020221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 621434232721 + 598767987601 = 788311^2 + 773801^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1220202220294 and 1220202220303.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 305050555079 + ... + 305050555082.

Almost surely, 2^{1220202220322} is an apocalyptic number.

1220202220322 is a deficient number, since it is larger than the sum of its proper divisors (610101110164).

1220202220322 is an equidigital number, since it uses as much as digits as its factorization.

1220202220322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610101110163.

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 1220202220322 its reverse (2230222020221), we get a palindrome (3450424240543).

The spelling of 1220202220322 in words is "one trillion, two hundred twenty billion, two hundred two million, two hundred twenty thousand, three hundred twenty-two".