121320242 has 4 divisors (see below), whose sum is σ = 181980366. Its totient is φ = 60660120.

The previous prime is 121320223. The next prime is 121320257. The reversal of 121320242 is 242023121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 242023121 = 19 ⋅12738059.

It can be written as a sum of positive squares in only one way, i.e., 120582361 + 737881 = 10981^2 + 859^2 .

It is a super-2 number, since 2×121320242² = 29437202237877128, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121320242.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30330059 + ... + 30330062.

Almost surely, 2^121320242 is an apocalyptic number.

121320242 is a deficient number, since it is larger than the sum of its proper divisors (60660124).

121320242 is an equidigital number, since it uses as much as digits as its factorization.

121320242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60660123.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 121320242 is about 11014.5468358893. The cubic root of 121320242 is about 495.0447084061.

Adding to 121320242 its reverse (242023121), we get a palindrome (363343363).

The spelling of 121320242 in words is "one hundred twenty-one million, three hundred twenty thousand, two hundred forty-two".