1221203045222 has 4 divisors (see below), whose sum is σ = 1831804567836. Its totient is φ = 610601522610.

The previous prime is 1221203045203. The next prime is 1221203045239. The reversal of 1221203045222 is 2225403021221.

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

It is a junction number, because it is equal to n+sod(n) for n = 1221203045191 and 1221203045200.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305300761304 + ... + 305300761307.

It is an arithmetic number, because the mean of its divisors is an integer number (457951141959).

Almost surely, 2^{1221203045222} is an apocalyptic number.

1221203045222 is a deficient number, since it is larger than the sum of its proper divisors (610601522614).

1221203045222 is an equidigital number, since it uses as much as digits as its factorization.

1221203045222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610601522613.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 1221203045222 its reverse (2225403021221), we get a palindrome (3446606066443).

The spelling of 1221203045222 in words is "one trillion, two hundred twenty-one billion, two hundred three million, forty-five thousand, two hundred twenty-two".