242136121 has 2 divisors, whose sum is σ = 242136122. Its totient is φ = 242136120.

The previous prime is 242136107. The next prime is 242136131. The reversal of 242136121 is 121631242.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 235192896 + 6943225 = 15336^2 + 2635^2 .

It is a cyclic number.

It is not a de Polignac number, because 242136121 - 2¹¹ = 242134073 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 242136092 and 242136101.

It is not a weakly prime, because it can be changed into another prime (242136131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121068060 + 121068061.

It is an arithmetic number, because the mean of its divisors is an integer number (121068061).

Almost surely, 2^242136121 is an apocalyptic number.

It is an amenable number.

242136121 is a deficient number, since it is larger than the sum of its proper divisors (1).

242136121 is an equidigital number, since it uses as much as digits as its factorization.

242136121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 22.

The square root of 242136121 is about 15560.7236656911. The cubic root of 242136121 is about 623.2847870975.

Adding to 242136121 its reverse (121631242), we get a palindrome (363767363).

The spelling of 242136121 in words is "two hundred forty-two million, one hundred thirty-six thousand, one hundred twenty-one".