2111061011566 has 16 divisors (see below), whose sum is σ = 3413476758384. Its totient is φ = 973392629184.

The previous prime is 2111061011561. The next prime is 2111061011627. The reversal of 2111061011566 is 6651101601112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111061011561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39273556 + ... + 39327271.

It is an arithmetic number, because the mean of its divisors is an integer number (213342297399).

Almost surely, 2^{2111061011566} is an apocalyptic number.

2111061011566 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2111061011566 is a deficient number, since it is larger than the sum of its proper divisors (1302415746818).

2111061011566 is a wasteful number, since it uses less digits than its factorization.

2111061011566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78601875.

The product of its (nonzero) digits is 2160, while the sum is 31.

Adding to 2111061011566 its reverse (6651101601112), we get a palindrome (8762162612678).

The spelling of 2111061011566 in words is "two trillion, one hundred eleven billion, sixty-one million, eleven thousand, five hundred sixty-six".