1221200302 has 16 divisors (see below), whose sum is σ = 2094019200. Its totient is φ = 523238328.

The previous prime is 1221200273. The next prime is 1221200311. The reversal of 1221200302 is 2030021221.

It is a congruent 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, 62833 + ... + 79939.

It is an arithmetic number, because the mean of its divisors is an integer number (130876200).

Almost surely, 2^1221200302 is an apocalyptic number.

1221200302 is a deficient number, since it is larger than the sum of its proper divisors (872818898).

1221200302 is a wasteful number, since it uses less digits than its factorization.

1221200302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22215.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 1221200302 is about 34945.6764421580. The cubic root of 1221200302 is about 1068.8800410738.

Adding to 1221200302 its reverse (2030021221), we get a palindrome (3251221523).

The spelling of 1221200302 in words is "one billion, two hundred twenty-one million, two hundred thousand, three hundred two".