1311025011111 has 16 divisors (see below), whose sum is σ = 1946454238720. Its totient is φ = 872128940760.

The previous prime is 1311025011091. The next prime is 1311025011113. The reversal of 1311025011111 is 1111105201131.

1311025011111 is a `hidden beast` number, since 131 + 10 + 2 + 501 + 11 + 11 = 666.

It is not a de Polignac number, because 1311025011111 - 2⁹ = 1311025010599 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 (1311025011113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52424305 + ... + 52449306.

It is an arithmetic number, because the mean of its divisors is an integer number (121653389920).

Almost surely, 2^{1311025011111} is an apocalyptic number.

1311025011111 is a deficient number, since it is larger than the sum of its proper divisors (635429227609).

1311025011111 is a wasteful number, since it uses less digits than its factorization.

1311025011111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104874083 (or 104874077 counting only the distinct ones).

The product of its (nonzero) digits is 30, while the sum is 18.

The spelling of 1311025011111 in words is "one trillion, three hundred eleven billion, twenty-five million, eleven thousand, one hundred eleven".