1221211302 has 8 divisors (see below), whose sum is σ = 2442422616. Its totient is φ = 407070432.

The previous prime is 1221211291. The next prime is 1221211331. The reversal of 1221211302 is 2031121221.

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

1221211302 is an admirable number.

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 3 ways as a sum of consecutive naturals, for example, 101767603 + ... + 101767614.

It is an arithmetic number, because the mean of its divisors is an integer number (305302827).

Almost surely, 2^1221211302 is an apocalyptic number.

1221211302 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.

1221211302 is a wasteful number, since it uses less digits than its factorization.

1221211302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203535222.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1221211302 is about 34945.8338289416. The cubic root of 1221211302 is about 1068.8832503876.

Adding to 1221211302 its reverse (2031121221), we get a palindrome (3252332523).

The spelling of 1221211302 in words is "one billion, two hundred twenty-one million, two hundred eleven thousand, three hundred two".