123211042 has 4 divisors (see below), whose sum is σ = 184816566. Its totient is φ = 61605520.

The previous prime is 123211037. The next prime is 123211051. The reversal of 123211042 is 240112321.

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

It can be written as a sum of positive squares in only one way, i.e., 91412721 + 31798321 = 9561^2 + 5639^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30802759 + ... + 30802762.

Almost surely, 2^123211042 is an apocalyptic number.

123211042 is a deficient number, since it is larger than the sum of its proper divisors (61605524).

123211042 is an equidigital number, since it uses as much as digits as its factorization.

123211042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61605523.

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

The square root of 123211042 is about 11100.0469368377. The cubic root of 123211042 is about 497.6032522240.

Adding to 123211042 its reverse (240112321), we get a palindrome (363323363).

The spelling of 123211042 in words is "one hundred twenty-three million, two hundred eleven thousand, forty-two".