1011115206511 has 4 divisors (see below), whose sum is σ = 1011530110552. Its totient is φ = 1010700302472.

The previous prime is 1011115206509. The next prime is 1011115206527. The reversal of 1011115206511 is 1156025111101.

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 1011115206511 - 2¹ = 1011115206509 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 (1011115206911) 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, 207448365 + ... + 207453238.

It is an arithmetic number, because the mean of its divisors is an integer number (252882527638).

Almost surely, 2^{1011115206511} is an apocalyptic number.

1011115206511 is a deficient number, since it is larger than the sum of its proper divisors (414904041).

1011115206511 is an equidigital number, since it uses as much as digits as its factorization.

1011115206511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414904040.

The product of its (nonzero) digits is 300, while the sum is 25.

The spelling of 1011115206511 in words is "one trillion, eleven billion, one hundred fifteen million, two hundred six thousand, five hundred eleven".