123211242 has 48 divisors (see below), whose sum is σ = 332834112. Its totient is φ = 32002560.

The previous prime is 123211241. The next prime is 123211247. The reversal of 123211242 is 242112321.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (123211241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43063 + ... + 45834.

It is an arithmetic number, because the mean of its divisors is an integer number (6934044).

Almost surely, 2^123211242 is an apocalyptic number.

123211242 is an abundant number, since it is smaller than the sum of its proper divisors (209622870).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123211242 is a wasteful number, since it uses less digits than its factorization.

123211242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88923 (or 88920 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 123211242 is about 11100.0559458050. The cubic root of 123211242 is about 497.6035214656.

Adding to 123211242 its reverse (242112321), we get a palindrome (365323563).

The spelling of 123211242 in words is "one hundred twenty-three million, two hundred eleven thousand, two hundred forty-two".