1331213201 has 2 divisors, whose sum is σ = 1331213202. Its totient is φ = 1331213200.

The previous prime is 1331213183. The next prime is 1331213227. The reversal of 1331213201 is 1023121331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1157632576 + 173580625 = 34024^2 + 13175^2 .

It is a cyclic number.

It is not a de Polignac number, because 1331213201 - 2¹⁴ = 1331196817 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1331213201.

It is not a weakly prime, because it can be changed into another prime (1331213281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665606600 + 665606601.

It is an arithmetic number, because the mean of its divisors is an integer number (665606601).

Almost surely, 2^1331213201 is an apocalyptic number.

It is an amenable number.

1331213201 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331213201 is an equidigital number, since it uses as much as digits as its factorization.

1331213201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1331213201 is about 36485.7945096444. The cubic root of 1331213201 is about 1100.0587299222.

Adding to 1331213201 its reverse (1023121331), we get a palindrome (2354334532).

The spelling of 1331213201 in words is "one billion, three hundred thirty-one million, two hundred thirteen thousand, two hundred one".