1220221001222 has 4 divisors (see below), whose sum is σ = 1830331501836. Its totient is φ = 610110500610.

The previous prime is 1220221001171. The next prime is 1220221001249. The reversal of 1220221001222 is 2221001220221.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1220221001222.

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, 305055250304 + ... + 305055250307.

It is an arithmetic number, because the mean of its divisors is an integer number (457582875459).

Almost surely, 2^{1220221001222} is an apocalyptic number.

1220221001222 is a deficient number, since it is larger than the sum of its proper divisors (610110500614).

1220221001222 is an equidigital number, since it uses as much as digits as its factorization.

1220221001222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610110500613.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 1220221001222 its reverse (2221001220221), we get a palindrome (3441222221443).

The spelling of 1220221001222 in words is "one trillion, two hundred twenty billion, two hundred twenty-one million, one thousand, two hundred twenty-two".