121242 has 24 divisors (see below), whose sum is σ = 268128. Its totient is φ = 36520.

The previous prime is 121229. The next prime is 121259. The reversal of 121242 is 242121.

It is a nialpdrome in base 11.

It is an unprimeable number.

121242 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 643 + ... + 809.

It is an arithmetic number, because the mean of its divisors is an integer number (11172).

2¹²¹²⁴² is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134064).

121242 is an abundant number, since it is smaller than the sum of its proper divisors (146886).

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

121242 is a wasteful number, since it uses less digits than its factorization.

121242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194 (or 183 counting only the distinct ones).

The product of its digits is 32, while the sum is 12.

The square root of 121242 is about 348.1982194096. The cubic root of 121242 is about 49.4938263906.

Adding to 121242 its reverse (242121), we get a palindrome (363363).

It can be divided in two parts, 121 and 242, that added together give a palindrome (363).

The spelling of 121242 in words is "one hundred twenty-one thousand, two hundred forty-two", and thus it is an iban number.