1220221110002 has 4 divisors (see below), whose sum is σ = 1830331665006. Its totient is φ = 610110555000.

The previous prime is 1220221109981. The next prime is 1220221110013. The reversal of 1220221110002 is 2000111220221.

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., 1177140371521 + 43080738481 = 1084961^2 + 207559^2 .

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, 305055277499 + ... + 305055277502.

Almost surely, 2^{1220221110002} is an apocalyptic number.

1220221110002 is a deficient number, since it is larger than the sum of its proper divisors (610110555004).

1220221110002 is an equidigital number, since it uses as much as digits as its factorization.

1220221110002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610110555003.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1220221110002 its reverse (2000111220221), we get a palindrome (3220332330223).

The spelling of 1220221110002 in words is "one trillion, two hundred twenty billion, two hundred twenty-one million, one hundred ten thousand, two".