4042166111021 has 4 divisors (see below), whose sum is σ = 4136169974112. Its totient is φ = 3948162247932.

The previous prime is 4042166110987. The next prime is 4042166111033. The reversal of 4042166111021 is 1201116612404.

4042166111021 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4042166111021 - 2²² = 4042161916717 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 (4042166119021) 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, 47001931481 + ... + 47001931566.

It is an arithmetic number, because the mean of its divisors is an integer number (1034042493528).

Almost surely, 2^{4042166111021} is an apocalyptic number.

It is an amenable number.

4042166111021 is a deficient number, since it is larger than the sum of its proper divisors (94003863091).

4042166111021 is an equidigital number, since it uses as much as digits as its factorization.

4042166111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94003863090.

The product of its (nonzero) digits is 2304, while the sum is 29.

The spelling of 4042166111021 in words is "four trillion, forty-two billion, one hundred sixty-six million, one hundred eleven thousand, twenty-one".