242021322121 has 4 divisors (see below), whose sum is σ = 245336682772. Its totient is φ = 238705961472.

The previous prime is 242021322029. The next prime is 242021322133. The reversal of 242021322121 is 121223120242.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 123692890000 + 118328432121 = 351700^2 + 343989^2 .

It is a cyclic number.

It is not a de Polignac number, because 242021322121 - 2¹⁵ = 242021289353 is a prime.

It is a super-2 number, since 2×242021322121² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 242021322092 and 242021322101.

It is not an unprimeable number, because it can be changed into a prime (242021326121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1657680216 + ... + 1657680361.

It is an arithmetic number, because the mean of its divisors is an integer number (61334170693).

Almost surely, 2^242021322121 is an apocalyptic number.

It is an amenable number.

242021322121 is a deficient number, since it is larger than the sum of its proper divisors (3315360651).

242021322121 is an equidigital number, since it uses as much as digits as its factorization.

242021322121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3315360650.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 242021322121 its reverse (121223120242), we get a palindrome (363244442363).

The spelling of 242021322121 in words is "two hundred forty-two billion, twenty-one million, three hundred twenty-two thousand, one hundred twenty-one".