1222221202 has 4 divisors (see below), whose sum is σ = 1833331806. Its totient is φ = 611110600.

The previous prime is 1222221197. The next prime is 1222221233. The reversal of 1222221202 is 2021222221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2021222221 = 23 ⋅87879227.

It can be written as a sum of positive squares in only one way, i.e., 847450321 + 374770881 = 29111^2 + 19359^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305555299 + ... + 305555302.

Almost surely, 2^1222221202 is an apocalyptic number.

1222221202 is a deficient number, since it is larger than the sum of its proper divisors (611110604).

1222221202 is an equidigital number, since it uses as much as digits as its factorization.

1222221202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611110603.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 1222221202 is about 34960.2803478462. The cubic root of 1222221202 is about 1069.1778125078.

Adding to 1222221202 its reverse (2021222221), we get a palindrome (3243443423).

It can be divided in two parts, 1222221 and 202, that multiplied together give a palindrome (246888642).

The spelling of 1222221202 in words is "one billion, two hundred twenty-two million, two hundred twenty-one thousand, two hundred two".