242124155321 has 4 divisors (see below), whose sum is σ = 245737948752. Its totient is φ = 238510361892.

The previous prime is 242124155281. The next prime is 242124155363. The reversal of 242124155321 is 123551421242.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 123551421242 = 2 ⋅61775710621.

It is a cyclic number.

It is not a de Polignac number, because 242124155321 - 2⁶ = 242124155257 is a prime.

It is a super-2 number, since 2×242124155321² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242124158321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1806896615 + ... + 1806896748.

It is an arithmetic number, because the mean of its divisors is an integer number (61434487188).

Almost surely, 2^242124155321 is an apocalyptic number.

It is an amenable number.

242124155321 is a deficient number, since it is larger than the sum of its proper divisors (3613793431).

242124155321 is an equidigital number, since it uses as much as digits as its factorization.

242124155321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3613793430.

The product of its digits is 19200, while the sum is 32.

Adding to 242124155321 its reverse (123551421242), we get a palindrome (365675576563).

The spelling of 242124155321 in words is "two hundred forty-two billion, one hundred twenty-four million, one hundred fifty-five thousand, three hundred twenty-one".