1311411202661 has 8 divisors (see below), whose sum is σ = 1498763126784. Its totient is φ = 1124061145200.

The previous prime is 1311411202643. The next prime is 1311411202681. The reversal of 1311411202661 is 1662021141131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1311411202661 - 2⁶ = 1311411202597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311411202631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1725011 + ... + 2366111.

It is an arithmetic number, because the mean of its divisors is an integer number (187345390848).

Almost surely, 2^{1311411202661} is an apocalyptic number.

It is an amenable number.

1311411202661 is a deficient number, since it is larger than the sum of its proper divisors (187351924123).

1311411202661 is an equidigital number, since it uses as much as digits as its factorization.

1311411202661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 933331.

The product of its (nonzero) digits is 1728, while the sum is 29.

Adding to 1311411202661 its reverse (1662021141131), we get a palindrome (2973432343792).

The spelling of 1311411202661 in words is "one trillion, three hundred eleven billion, four hundred eleven million, two hundred two thousand, six hundred sixty-one".