1221202202 has 16 divisors (see below), whose sum is σ = 1999007424. Its totient is φ = 554904000.

The previous prime is 1221202183. The next prime is 1221202223. The reversal of 1221202202 is 2022021221.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73202 + ... + 88322.

It is an arithmetic number, because the mean of its divisors is an integer number (124937964).

Almost surely, 2^1221202202 is an apocalyptic number.

1221202202 is a deficient number, since it is larger than the sum of its proper divisors (777805222).

1221202202 is a wasteful number, since it uses less digits than its factorization.

1221202202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18805.

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

The square root of 1221202202 is about 34945.7036271986. The cubic root of 1221202202 is about 1068.8805954112.

Adding to 1221202202 its reverse (2022021221), we get a palindrome (3243223423).

It can be divided in two parts, 1221 and 202202, that multiplied together give a palindrome (246888642).

The spelling of 1221202202 in words is "one billion, two hundred twenty-one million, two hundred two thousand, two hundred two".