1210666566111 has 8 divisors (see below), whose sum is σ = 1657849712304. Its totient is φ = 785297232000.

The previous prime is 1210666566061. The next prime is 1210666566127. The reversal of 1210666566111 is 1116656660121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1210666566111 - 2¹⁵ = 1210666533343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210666566191) 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, 5453452890 + ... + 5453453111.

It is an arithmetic number, because the mean of its divisors is an integer number (207231214038).

Almost surely, 2^{1210666566111} is an apocalyptic number.

1210666566111 is a deficient number, since it is larger than the sum of its proper divisors (447183146193).

1210666566111 is a wasteful number, since it uses less digits than its factorization.

1210666566111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10906906041.

The product of its (nonzero) digits is 77760, while the sum is 42.

The spelling of 1210666566111 in words is "one trillion, two hundred ten billion, six hundred sixty-six million, five hundred sixty-six thousand, one hundred eleven".