1321211301211 has 2 divisors, whose sum is σ = 1321211301212. Its totient is φ = 1321211301210.

The previous prime is 1321211301197. The next prime is 1321211301227. The reversal of 1321211301211 is 1121031121231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1321211301211 - 2¹³ = 1321211293019 is a prime.

It is not a weakly prime, because it can be changed into another prime (1321211301911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660605650605 + 660605650606.

It is an arithmetic number, because the mean of its divisors is an integer number (660605650606).

Almost surely, 2^{1321211301211} is an apocalyptic number.

1321211301211 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321211301211 is an equidigital number, since it uses as much as digits as its factorization.

1321211301211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 1321211301211 its reverse (1121031121231), we get a palindrome (2442242422442).

The spelling of 1321211301211 in words is "one trillion, three hundred twenty-one billion, two hundred eleven million, three hundred one thousand, two hundred eleven".