42120123211 has 4 divisors (see below), whose sum is σ = 42128418024. Its totient is φ = 42111828400.

The previous prime is 42120123209. The next prime is 42120123251. The reversal of 42120123211 is 11232102124.

42120123211 is digitally balanced in base 2, 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.

It is a cyclic number.

It is not a de Polignac number, because 42120123211 - 2¹ = 42120123209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42120123251) 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, 4139785 + ... + 4149946.

It is an arithmetic number, because the mean of its divisors is an integer number (10532104506).

Almost surely, 2^42120123211 is an apocalyptic number.

42120123211 is a deficient number, since it is larger than the sum of its proper divisors (8294813).

42120123211 is an equidigital number, since it uses as much as digits as its factorization.

42120123211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8294812.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 42120123211 its reverse (11232102124), we get a palindrome (53352225335).

The spelling of 42120123211 in words is "forty-two billion, one hundred twenty million, one hundred twenty-three thousand, two hundred eleven".