12101242 has 4 divisors (see below), whose sum is σ = 18151866. Its totient is φ = 6050620.

The previous prime is 12101237. The next prime is 12101269. The reversal of 12101242 is 24210121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24210121 = 13 ⋅1862317.

It can be written as a sum of positive squares in only one way, i.e., 11162281 + 938961 = 3341^2 + 969^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3025309 + ... + 3025312.

Almost surely, 2^12101242 is an apocalyptic number.

12101242 is a deficient number, since it is larger than the sum of its proper divisors (6050624).

12101242 is an equidigital number, since it uses as much as digits as its factorization.

12101242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6050623.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 12101242 is about 3478.6839465522. The cubic root of 12101242 is about 229.5848971479.

Adding to 12101242 its reverse (24210121), we get a palindrome (36311363).

The spelling of 12101242 in words is "twelve million, one hundred one thousand, two hundred forty-two".