1331200001 has 2 divisors, whose sum is σ = 1331200002. Its totient is φ = 1331200000.

The previous prime is 1331199997. The next prime is 1331200009. The reversal of 1331200001 is 1000021331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 752075776 + 579124225 = 27424^2 + 24065^2 .

It is a cyclic number.

It is not a de Polignac number, because 1331200001 - 2² = 1331199997 is a prime.

It is not a weakly prime, because it can be changed into another prime (1331200009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665600000 + 665600001.

It is an arithmetic number, because the mean of its divisors is an integer number (665600001).

Almost surely, 2^1331200001 is an apocalyptic number.

It is an amenable number.

1331200001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331200001 is an equidigital number, since it uses as much as digits as its factorization.

1331200001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 1331200001 is about 36485.6136168764. The cubic root of 1331200001 is about 1100.0550939348.

Adding to 1331200001 its reverse (1000021331), we get a palindrome (2331221332).

The spelling of 1331200001 in words is "one billion, three hundred thirty-one million, two hundred thousand, one".