1011155156105 has 16 divisors (see below), whose sum is σ = 1286220240144. Its totient is φ = 760476119040.

The previous prime is 1011155156083. The next prime is 1011155156147. The reversal of 1011155156105 is 5016515511101.

It can be written as a sum of positive squares in 8 ways, for example, as 223442704 + 1010931713401 = 14948^2 + 1005451^2 .

It is not a de Polignac number, because 1011155156105 - 2¹⁸ = 1011154893961 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6676502 + ... + 6826271.

It is an arithmetic number, because the mean of its divisors is an integer number (80388765009).

Almost surely, 2^{1011155156105} is an apocalyptic number.

It is an amenable number.

1011155156105 is a deficient number, since it is larger than the sum of its proper divisors (275065084039).

1011155156105 is a wasteful number, since it uses less digits than its factorization.

1011155156105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13503676.

The product of its (nonzero) digits is 3750, while the sum is 32.

The spelling of 1011155156105 in words is "one trillion, eleven billion, one hundred fifty-five million, one hundred fifty-six thousand, one hundred five".