1221102202 has 16 divisors (see below), whose sum is σ = 1860284160. Its totient is φ = 601020288.

The previous prime is 1221102193. The next prime is 1221102229. The reversal of 1221102202 is 2022011221.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 293674 + ... + 297802.

It is an arithmetic number, because the mean of its divisors is an integer number (116267760).

Almost surely, 2^1221102202 is an apocalyptic number.

1221102202 is a deficient number, since it is larger than the sum of its proper divisors (639181958).

1221102202 is a wasteful number, since it uses less digits than its factorization.

1221102202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6405.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1221102202 is about 34944.2728068563. The cubic root of 1221102202 is about 1068.8514189769.

Adding to 1221102202 its reverse (2022011221), we get a palindrome (3243113423).

The spelling of 1221102202 in words is "one billion, two hundred twenty-one million, one hundred two thousand, two hundred two".