1221220200202 has 16 divisors (see below), whose sum is σ = 1864811073024. Its totient is φ = 599648238000.

The previous prime is 1221220200191. The next prime is 1221220200251. The reversal of 1221220200202 is 2020020221221.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7854874 + ... + 8008837.

It is an arithmetic number, because the mean of its divisors is an integer number (116550692064).

Almost surely, 2^{1221220200202} is an apocalyptic number.

1221220200202 is a deficient number, since it is larger than the sum of its proper divisors (643590872822).

1221220200202 is a wasteful number, since it uses less digits than its factorization.

1221220200202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15864405.

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

Adding to 1221220200202 its reverse (2020020221221), we get a palindrome (3241240421423).

The spelling of 1221220200202 in words is "one trillion, two hundred twenty-one billion, two hundred twenty million, two hundred thousand, two hundred two".