1221002200202 has 16 divisors (see below), whose sum is σ = 1832526872712. Its totient is φ = 610159979520.

The previous prime is 1221002200151. The next prime is 1221002200207. The reversal of 1221002200202 is 2020022001221.

It can be written as a sum of positive squares in 4 ways, for example, as 889628126401 + 331374073801 = 943201^2 + 575651^2 .

It is not an unprimeable number, because it can be changed into a prime (1221002200207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66884108 + ... + 66902360.

Almost surely, 2^{1221002200202} is an apocalyptic number.

1221002200202 is a deficient number, since it is larger than the sum of its proper divisors (611524672510).

1221002200202 is a wasteful number, since it uses less digits than its factorization.

1221002200202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35113.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 1221002200202 its reverse (2020022001221), we get a palindrome (3241024201423).

The spelling of 1221002200202 in words is "one trillion, two hundred twenty-one billion, two million, two hundred thousand, two hundred two".