6106166051221 has 4 divisors (see below), whose sum is σ = 6106260801100. Its totient is φ = 6106071301344.

The previous prime is 6106166051207. The next prime is 6106166051239. The reversal of 6106166051221 is 1221506616016.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3530096111025 + 2576069940196 = 1878855^2 + 1605014^2 .

It is a cyclic number.

It is not a de Polignac number, because 6106166051221 - 2³⁹ = 5556410237333 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 (6106166051021) 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, 47278206 + ... + 47407183.

It is an arithmetic number, because the mean of its divisors is an integer number (1526565200275).

Almost surely, 2^{6106166051221} is an apocalyptic number.

It is an amenable number.

6106166051221 is a deficient number, since it is larger than the sum of its proper divisors (94749879).

6106166051221 is an equidigital number, since it uses as much as digits as its factorization.

6106166051221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94749878.

The product of its (nonzero) digits is 25920, while the sum is 37.

The spelling of 6106166051221 in words is "six trillion, one hundred six billion, one hundred sixty-six million, fifty-one thousand, two hundred twenty-one".