1221330411401 has 2 divisors, whose sum is σ = 1221330411402. Its totient is φ = 1221330411400.

The previous prime is 1221330411397. The next prime is 1221330411407. The reversal of 1221330411401 is 1041140331221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 640998789376 + 580331622025 = 800624^2 + 761795^2 .

It is an emirp because it is prime and its reverse (1041140331221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1221330411401 - 2² = 1221330411397 is a prime.

It is not a weakly prime, because it can be changed into another prime (1221330411407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610665205700 + 610665205701.

It is an arithmetic number, because the mean of its divisors is an integer number (610665205701).

Almost surely, 2^{1221330411401} is an apocalyptic number.

It is an amenable number.

1221330411401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221330411401 is an equidigital number, since it uses as much as digits as its factorization.

1221330411401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 1221330411401 its reverse (1041140331221), we get a palindrome (2262470742622).

The spelling of 1221330411401 in words is "one trillion, two hundred twenty-one billion, three hundred thirty million, four hundred eleven thousand, four hundred one".