1222221220202 has 4 divisors (see below), whose sum is σ = 1833331830306. Its totient is φ = 611110610100.

The previous prime is 1222221220151. The next prime is 1222221220271. The reversal of 1222221220202 is 2020221222221.

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., 661683006721 + 560538213481 = 813439^2 + 748691^2 .

It is a super-2 number, since 2×1222221220202² (a number of 25 digits) contains 22 as substring.

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, 305555305049 + ... + 305555305052.

Almost surely, 2^{1222221220202} is an apocalyptic number.

1222221220202 is a deficient number, since it is larger than the sum of its proper divisors (611110610104).

1222221220202 is an equidigital number, since it uses as much as digits as its factorization.

1222221220202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611110610103.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 1222221220202 its reverse (2020221222221), we get a palindrome (3242442442423).

The spelling of 1222221220202 in words is "one trillion, two hundred twenty-two billion, two hundred twenty-one million, two hundred twenty thousand, two hundred two".