1311255636101 has 4 divisors (see below), whose sum is σ = 1311541753632. Its totient is φ = 1310969518572.

The previous prime is 1311255636073. The next prime is 1311255636113. The reversal of 1311255636101 is 1016365521131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1311255636101 - 2³⁰ = 1310181894277 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 (1311255636121) 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, 143051891 + ... + 143061056.

It is an arithmetic number, because the mean of its divisors is an integer number (327885438408).

Almost surely, 2^{1311255636101} is an apocalyptic number.

It is an amenable number.

1311255636101 is a deficient number, since it is larger than the sum of its proper divisors (286117531).

1311255636101 is an equidigital number, since it uses as much as digits as its factorization.

1311255636101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286117530.

The product of its (nonzero) digits is 16200, while the sum is 35.

The spelling of 1311255636101 in words is "one trillion, three hundred eleven billion, two hundred fifty-five million, six hundred thirty-six thousand, one hundred one".