1213405320401 has 4 divisors (see below), whose sum is σ = 1284782103972. Its totient is φ = 1142028536832.

The previous prime is 1213405320353. The next prime is 1213405320527. The reversal of 1213405320401 is 1040235043121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 919911174400 + 293494146001 = 959120^2 + 541751^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213405320401 - 2³⁸ = 938527413457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213405320601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35688391760 + ... + 35688391793.

It is an arithmetic number, because the mean of its divisors is an integer number (321195525993).

Almost surely, 2^{1213405320401} is an apocalyptic number.

It is an amenable number.

1213405320401 is a deficient number, since it is larger than the sum of its proper divisors (71376783571).

1213405320401 is an equidigital number, since it uses as much as digits as its factorization.

1213405320401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71376783570.

The product of its (nonzero) digits is 2880, while the sum is 26.

The spelling of 1213405320401 in words is "one trillion, two hundred thirteen billion, four hundred five million, three hundred twenty thousand, four hundred one".