1221300020333 has 4 divisors (see below), whose sum is σ = 1227499513020. Its totient is φ = 1215100527648.

The previous prime is 1221300020329. The next prime is 1221300020351. The reversal of 1221300020333 is 3330200031221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 608270526889 + 613029493444 = 779917^2 + 782962^2 .

It is a cyclic number.

It is not a de Polignac number, because 1221300020333 - 2² = 1221300020329 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221300020363) 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, 3099746048 + ... + 3099746441.

It is an arithmetic number, because the mean of its divisors is an integer number (306874878255).

Almost surely, 2^{1221300020333} is an apocalyptic number.

It is an amenable number.

1221300020333 is a deficient number, since it is larger than the sum of its proper divisors (6199492687).

1221300020333 is an equidigital number, since it uses as much as digits as its factorization.

1221300020333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6199492686.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 1221300020333 its reverse (3330200031221), we get a palindrome (4551500051554).

The spelling of 1221300020333 in words is "one trillion, two hundred twenty-one billion, three hundred million, twenty thousand, three hundred thirty-three".