1221220302 has 8 divisors (see below), whose sum is σ = 2442440616. Its totient is φ = 407073432.

The previous prime is 1221220289. The next prime is 1221220303. The reversal of 1221220302 is 2030221221.

It is a happy number.

1221220302 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

1221220302 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221220303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101768353 + ... + 101768364.

It is an arithmetic number, because the mean of its divisors is an integer number (305305077).

Almost surely, 2^1221220302 is an apocalyptic number.

1221220302 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221220302 is a wasteful number, since it uses less digits than its factorization.

1221220302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203536722.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 1221220302 is about 34945.9625994191. The cubic root of 1221220302 is about 1068.8858761755.

Adding to 1221220302 its reverse (2030221221), we get a palindrome (3251441523).

The spelling of 1221220302 in words is "one billion, two hundred twenty-one million, two hundred twenty thousand, three hundred two".