1221230023306 has 16 divisors (see below), whose sum is σ = 1895051307240. Its totient is φ = 589547125440.

The previous prime is 1221230023303. The next prime is 1221230023319. The reversal of 1221230023306 is 6033200321221.

It can be written as a sum of positive squares in 4 ways, for example, as 1083025269225 + 138204754081 = 1040685^2 + 371759^2 .

It is not an unprimeable number, because it can be changed into a prime (1221230023303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3022000 + ... + 3402196.

Almost surely, 2^{1221230023306} is an apocalyptic number.

1221230023306 is a deficient number, since it is larger than the sum of its proper divisors (673821283934).

1221230023306 is a wasteful number, since it uses less digits than its factorization.

1221230023306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435609.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 1221230023306 its reverse (6033200321221), we get a palindrome (7254430344527).

The spelling of 1221230023306 in words is "one trillion, two hundred twenty-one billion, two hundred thirty million, twenty-three thousand, three hundred six".