1213203110401 has 4 divisors (see below), whose sum is σ = 1213231213012. Its totient is φ = 1213175007792.

The previous prime is 1213203110393. The next prime is 1213203110407. The reversal of 1213203110401 is 1040113023121.

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 453769293376 + 759433817025 = 673624^2 + 871455^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213203110401 - 2³ = 1213203110393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213203110407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13986450 + ... + 14072923.

It is an arithmetic number, because the mean of its divisors is an integer number (303307803253).

Almost surely, 2^{1213203110401} is an apocalyptic number.

It is an amenable number.

1213203110401 is a deficient number, since it is larger than the sum of its proper divisors (28102611).

1213203110401 is an equidigital number, since it uses as much as digits as its factorization.

1213203110401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28102610.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1213203110401 its reverse (1040113023121), we get a palindrome (2253316133522).

The spelling of 1213203110401 in words is "one trillion, two hundred thirteen billion, two hundred three million, one hundred ten thousand, four hundred one".