1213453221401 has 2 divisors, whose sum is σ = 1213453221402. Its totient is φ = 1213453221400.

The previous prime is 1213453221389. The next prime is 1213453221443. The reversal of 1213453221401 is 1041223543121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1117756417600 + 95696803801 = 1057240^2 + 309349^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213453221401 - 2¹⁴ = 1213453205017 is a prime.

It is not a weakly prime, because it can be changed into another prime (1213453721401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606726610700 + 606726610701.

It is an arithmetic number, because the mean of its divisors is an integer number (606726610701).

Almost surely, 2^{1213453221401} is an apocalyptic number.

It is an amenable number.

1213453221401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213453221401 is an equidigital number, since it uses as much as digits as its factorization.

1213453221401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 29.

Adding to 1213453221401 its reverse (1041223543121), we get a palindrome (2254676764522).

The spelling of 1213453221401 in words is "one trillion, two hundred thirteen billion, four hundred fifty-three million, two hundred twenty-one thousand, four hundred one".