1220221002122 has 4 divisors (see below), whose sum is σ = 1830331503186. Its totient is φ = 610110501060.

The previous prime is 1220221002113. The next prime is 1220221002197. The reversal of 1220221002122 is 2212001220221.

It is a happy number.

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., 1160211191161 + 60009810961 = 1077131^2 + 244969^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1220221002122.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305055250529 + ... + 305055250532.

Almost surely, 2^{1220221002122} is an apocalyptic number.

1220221002122 is a deficient number, since it is larger than the sum of its proper divisors (610110501064).

1220221002122 is an equidigital number, since it uses as much as digits as its factorization.

1220221002122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610110501063.

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

Adding to 1220221002122 its reverse (2212001220221), we get a palindrome (3432222222343).

The spelling of 1220221002122 in words is "one trillion, two hundred twenty billion, two hundred twenty-one million, two thousand, one hundred twenty-two".