42123211 has 4 divisors (see below), whose sum is σ = 45363472. Its totient is φ = 38882952.

The previous prime is 42123199. The next prime is 42123217. The reversal of 42123211 is 11232124.

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 42123211 - 2⁷ = 42123083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42123217) 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, 1620111 + ... + 1620136.

It is an arithmetic number, because the mean of its divisors is an integer number (11340868).

Almost surely, 2^42123211 is an apocalyptic number.

42123211 is a deficient number, since it is larger than the sum of its proper divisors (3240261).

42123211 is a wasteful number, since it uses less digits than its factorization.

42123211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3240260.

The product of its digits is 96, while the sum is 16.

The square root of 42123211 is about 6490.2396719998. The cubic root of 42123211 is about 347.9422411517.

Adding to 42123211 its reverse (11232124), we get a palindrome (53355335).

It can be divided in two parts, 421 and 23211, that added together give a palindrome (23632).

The spelling of 42123211 in words is "forty-two million, one hundred twenty-three thousand, two hundred eleven".