1221333301 has 6 divisors (see below), whose sum is σ = 1229186850. Its totient is φ = 1213529616.

The previous prime is 1221333287. The next prime is 1221333307. The reversal of 1221333301 is 1033331221.

It can be written as a sum of positive squares in 3 ways, for example, as 158508100 + 1062825201 = 12590^2 + 32601^2 .

It is not a de Polignac number, because 1221333301 - 2¹⁹ = 1220809013 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 (1221333307) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 126 + ... + 49423.

It is an arithmetic number, because the mean of its divisors is an integer number (204864475).

Almost surely, 2^1221333301 is an apocalyptic number.

It is an amenable number.

1221333301 is a deficient number, since it is larger than the sum of its proper divisors (7853549).

1221333301 is an frugal number, since it uses more digits than its factorization.

1221333301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49863 (or 49706 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 1221333301 is about 34947.5793296188. The cubic root of 1221333301 is about 1068.9188430120.

Adding to 1221333301 its reverse (1033331221), we get a palindrome (2254664522).

The spelling of 1221333301 in words is "one billion, two hundred twenty-one million, three hundred thirty-three thousand, three hundred one".