1221302002 has 8 divisors (see below), whose sum is σ = 1866518316. Its totient is φ = 599129232.

The previous prime is 1221301993. The next prime is 1221302021. The reversal of 1221302002 is 2002031221.

It can be written as a sum of positive squares in 2 ways, for example, as 1173816121 + 47485881 = 34261^2 + 6891^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5760753 + ... + 5760964.

Almost surely, 2^1221302002 is an apocalyptic number.

1221302002 is a deficient number, since it is larger than the sum of its proper divisors (645216314).

1221302002 is a wasteful number, since it uses less digits than its factorization.

1221302002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11521772.

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

The square root of 1221302002 is about 34947.1315274945. The cubic root of 1221302002 is about 1068.9097119046.

Adding to 1221302002 its reverse (2002031221), we get a palindrome (3223333223).

The spelling of 1221302002 in words is "one billion, two hundred twenty-one million, three hundred two thousand, two".