242661121 has 2 divisors, whose sum is σ = 242661122. Its totient is φ = 242661120.

The previous prime is 242661119. The next prime is 242661137. The reversal of 242661121 is 121166242.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 145540096 + 97121025 = 12064^2 + 9855^2 .

It is a cyclic number.

It is not a de Polignac number, because 242661121 - 2¹ = 242661119 is a prime.

Together with 242661119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (242661101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121330560 + 121330561.

It is an arithmetic number, because the mean of its divisors is an integer number (121330561).

Almost surely, 2^242661121 is an apocalyptic number.

It is an amenable number.

242661121 is a deficient number, since it is larger than the sum of its proper divisors (1).

242661121 is an equidigital number, since it uses as much as digits as its factorization.

242661121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 25.

The square root of 242661121 is about 15577.5839269124. The cubic root of 242661121 is about 623.7349310084.

The spelling of 242661121 in words is "two hundred forty-two million, six hundred sixty-one thousand, one hundred twenty-one".