1245041201311 has 4 divisors (see below), whose sum is σ = 1251559741824. Its totient is φ = 1238522660800.

The previous prime is 1245041201303. The next prime is 1245041201323. The reversal of 1245041201311 is 1131021405421.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1245041201311 - 2³ = 1245041201303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245041211311) 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, 3259269970 + ... + 3259270351.

It is an arithmetic number, because the mean of its divisors is an integer number (312889935456).

Almost surely, 2^{1245041201311} is an apocalyptic number.

1245041201311 is a deficient number, since it is larger than the sum of its proper divisors (6518540513).

1245041201311 is an equidigital number, since it uses as much as digits as its factorization.

1245041201311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6518540512.

The product of its (nonzero) digits is 960, while the sum is 25.

Adding to 1245041201311 its reverse (1131021405421), we get a palindrome (2376062606732).

The spelling of 1245041201311 in words is "one trillion, two hundred forty-five billion, forty-one million, two hundred one thousand, three hundred eleven".