1611000011011 has 4 divisors (see below), whose sum is σ = 1611036053352. Its totient is φ = 1610963968672.

The previous prime is 1611000011009. The next prime is 1611000011057. The reversal of 1611000011011 is 1101100001161.

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 1611000011011 - 2¹ = 1611000011009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1611000010982 and 1611000011000.

It is not an unprimeable number, because it can be changed into a prime (1611000011081) 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, 17954041 + ... + 18043546.

It is an arithmetic number, because the mean of its divisors is an integer number (402759013338).

Almost surely, 2^{1611000011011} is an apocalyptic number.

1611000011011 is a deficient number, since it is larger than the sum of its proper divisors (36042341).

1611000011011 is an equidigital number, since it uses as much as digits as its factorization.

1611000011011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36042340.

The product of its (nonzero) digits is 6, while the sum is 13.

Adding to 1611000011011 its reverse (1101100001161), we get a palindrome (2712100012172).

The spelling of 1611000011011 in words is "one trillion, six hundred eleven billion, eleven thousand, eleven".